They all stood there in stunned silence, staring at Ellie. Well, except for Ward, who was staring up at her from the ground with an expression of mixed awe and fear.

Jemma had always trusted her vision, but the anomaly before her was undoubtedly the most unbelievable thing she had ever seen. Who the hell was this girl? She looked like her sister. She had the same face, the same hair, the same petite form as Ellie. But the girl in front of her couldn't be her sister because her sister had never thrown anyone in her life, let alone a 6'3" S.H.I.E.L.D. specialist.

Jemma hadn't seen Ellie since the holidays, and thinking back she didn't remember noticing anything strange about her. She supposed Ellie's arms had had a little more tone to them, but she was still so thin that it had hardly made a difference. And surely she would have mentioned to Mum and Dad that she had suddenly acquired the ability to bring Operations specialists to the ground. Ellie talked about everything. Why hadn't Jemma known about this?

She had taken down Ward in a matter of seconds. Ward. What on earth was going on?

Jemma glanced over at Fitz, expecting to see the same stunned bewilderment on his face, but he was smirking. Actually smirking. So he'd known about Ellie's new combat skills and hadn't thought to mention it? Jemma narrowed her eyes in his direction. She was going to kill him later. Very, very slowly.

"Holy…crap," Jemma heard Skye exclaim, and turned back to the strange spectacle before her.

"Oh! Are you all right? I hope I didn't hurt you." Ellie straightened her blouse and offered a hand to help Ward.

Ward shook his head, indicating that he didn't need her assistance, and slowly stood up. "I'm fine. Really, I'm fine." He was smiling, trying to pretend like he had meant for that to happen, but Jemma could tell that he was brutally embarrassed. "Those were, uh…that was…good. That was good. Very impressive."

She beamed up at him, obviously pleased with herself.

"Ellie…" Jemma said slowly. When Ellie met her eyes, she took a couple seconds to find her words. "Where on earth did you learn to do that?"

Ellie laughed. "At the Academy, of course." Jemma must have looked utterly baffled because a look of realization dawned on Ellie's face. "Oh, that's right! Silly me. You wouldn't have known about that. A group of us formed after it was rumored that you two had been sent into the field," she said, motioning between Jemma and Fitz. "Because if you were going out there, we needed to prepare ourselves for that possibility as well. It started out quite small, but after a while the numbers started growing and growing, and now it's a regular thing we've been doing in the-" She paused. "Um, well…in a covert location…at the Academy." Ellie was raising her eyebrows pointedly, apparently hoping that Jemma would catch on.

Jemma rolled her eyes, but Fitz spoke up before she did. "Ward and Skye know about the Boiler Room, Ellie."

Ellie looked crestfallen. "Oh! But…it's supposed to be a secret."

"Don't worry," Ward smiled at her. "Your secret's safe with us."

"Wait," Skye interjected. "The Boiler Room? You went to SciTech?"

Ellie nodded.

"And you just graduated?"

"Yes."

Skye shook her head. "Then how come we didn't see you when we came and visited during that whole ice storm fiasco?"

Ellie gave a small groan. "I heard about that. I was so disappointed. I was on the other side of the country doing research for my independent project with Professor Martell. I wanted to come back for Leo and Jemma's lecture, but the samples we were dealing with couldn't wait."

"I wouldn't be totally disappointed," Skye reassured her. "You only missed them talking for, like, five minutes before they were interrupted by Mr. Freeze. And then, of course, you dodged Winter Storm Donnie."

Ellie didn't look very relieved. "I know, I can't believe I missed everything."

While they had been talking, Jemma's vision went out of focus as she tried to process what Ellie had said. Something was off. "Ellie, what were you doing on the other side of the country?"

Ellie smiled at her, but Jemma could see a flash of something like fear in her eyes. "My independent project, of course."

Jemma shook her head. "SciTech has a plethora of resources to offer its students, plenty more than any of S.H.I.E.L.D.'s bases over on the west coast."

"Oh, um, well, we weren't at any of the major bases."

"Where were you, then?"

Ellie laughed nervously. "You know, I actually have no idea. I was told it was a classified location, and, you know, being a student, I was only told what I needed to know in order to complete my research." It seemed like Ellie was telling the truth, but Jemma knew her well enough to know that Ellie had a masterful way of lying without actually lying. She was definitely hiding something. Jemma opened her mouth to press further, but Coulson's voice came over the comms.

"Team meeting in five in the conference room."

Ellie's face lit up and she avoided Jemma's gaze. "Oh! A team meeting. This is so exciting." Jemma sighed as Ellie led the group up the steps, vowing to herself that she would get to the bottom of what her sister was keeping from her.

"Skye, what've you got?"

They were all gathered around the Holocom in the conference room, looking at the images that flashed on the screen. Fitz made a point to stand in between Jemma and Ellie to keep Jemma from interrogating her sister any further. He wanted to get this mission over with. As much as he loved Ellie, he really didn't feel comfortable with her being there in the field. Jemma already gave him enough to worry about.

"All right, from what Sitwell gave us, the signals seem to be coming from, get this, Denver International Airport." Skye looked at them expectantly, obviously hoping for some kind of reaction. Fitz didn't really know what was so special about an airport, and looking around the room, no one else did either.

"At least I won't have trouble finding somewhere to park," May quipped.

Skye had a look of incredulity on her face. "Oh, come on, guys. Seriously? None of you know about the Denver airport?"

"Why don't you fill us in?" Coulson replied, looking slightly annoyed.

Skye shook her head, but she seemed excited to share whatever info she had. "Okay, you guys are going to flip." She pulled up a few web pages on the screen. "The airport was commissioned in 1989 with a budget of a little under two billion dollars. It wasn't finished until '95, two years later than the projected timetable, at a cost of almost five billion."

"Okay," Coulson said confusedly. "So they went a little over budget. What's the big deal?"

Skye sighed in irritation. "Because no one knows where the money came from. The project was privately funded by something called the New World Airport Commission. At least, that's what it says on all the documents filed during the construction. But here's the kicker. The New World Airport Commission? It doesn't exist."

Ward groaned. "Skye, this isn't another conspiracy theory, is it? We're on a mission."

Skye folded her arms. "Ward, you haven't even heard the half of it. And we're dealing with an 0-8-4 here. Who knows what that means? I think we all need to at least open our minds a little bit."

"Skye, is it really relevant?" Coulson asked.

She rolled her eyes and swiped something on the table, bringing up a couple diagrams onto the screen. "Yes. They built the airport in the early 90s, right? But the thing is, Denver already had an airport. They didn't need another one, let alone one that takes up over fifty square miles."

Fitz looked at the diagram, and even though he hated to admit it, he found his interest had piqued. Who would need that much acreage? And in Denver, no less.

"The weird size isn't the only thing. There's also a bunch of creepy apocalyptic artwork all over the place, which is what originally inspired a lot of people to post their theories online." A few disturbing murals and statues flashed in front of their eyes as Skye flipped through them. "But when you dig deeper, you find that there are actually five buildings in the original blueprints that are unaccounted for. It turns out they were actually built under the airport runways, along with a tunnel system. Now, the airport authorities have released statements saying the underground base is used for storage, but, I mean, come on. No airport needs that much storage."

"What do you think is actually down there?" Coulson asked skeptically.

Skye shrugged. "Beats me. But there are all kinds of theories out there. Some say the buildings underground were part of a bunker that had already been there, built right after World War II by Nazi sympathizers to hide war criminals, and that the airport was created to cover it up. Some say it's been reopened by neo-Nazis, who've been using the base to develop some sort of biological warfare. But whatever shady stuff is happening down there, there's one thing that can't be disputed. The place is built to withstand a nuclear explosion."

There was a heavy pause in the room as everyone absorbed Skye's words. It sure sounded like a place to find an 0-8-4.

"I'll get a hold of airport security, see if they can help us out. If it really is in an underground bunker, and we're just now getting the signals, something must have woken it up." Coulson glanced around the room. "We're going to have to assume this will be a combat op. Ward and May, you'll be coming with me. Fitz, if we can get you in there, do you think the D.W.A.R.F.s could help us figure out what the 0-8-4 is?"

Fitz nodded. "If it's anything like the one we found in Peru, though, it'd probably be best if we brought a containment case. Especially if we have to get out of there fast."

"Okay, you'll be in charge of that then. Can you also get the Night-Night guns ready for us?"

"Well, they're ICERs now…" He trailed off as Coulson glared at him. "But yes, sir."

"Wait," Ellie spoke up. As they all turned to look at her, she smiled apologetically, but her face was filled with alarm. "Sorry. It's just…sir, did you say Leo was going to be going in with you?"

Fitz nudged her arm with his. "Don't worry, El. I've gone in loads of times. They give me a bulletproof vest and everything." She didn't laugh, the fear still etched plainly on her face. He heard Jemma scoff behind him and avoided looking over at her, knowing he would see the same fear in her eyes. Why did everyone think he was utterly incapable of going into the field?

"We'll keep an eye on him," Coulson assured her. Ellie hesitated before nodding, but Fitz could tell she still wasn't crazy about the idea of him rushing into potential danger.

"Simmons, you'll stay here on the Bus with your sister and monitor the comms."

Fitz turned to see that Jemma was less than thrilled by her impending task, but she nodded. "Yes, sir," she said quietly.

"Uh, Coulson?" Skye interjected.

"Yeah?"

"What about me?"

"We'll also have you on the comms. You can guide us through the airport and give us intel in real time. Airport security detail, traffic control info, that kind of thing."

Skye shook her head. "You already have Simmons on the comms, and intel isn't going to mean squat if you run into hostiles." She took a breath. "I want to go with you."

Almost everyone in the room spoke up at once.

"Absolutely not. Your condition-"

"No way. Sir, she's hardly had enough combat training-"

"Agent Coulson, please see reason-"

Coulson held his hands up in a time-out signal. They all fell silent. Agent May hadn't said anything, but she was looking at Coulson expectantly, seemingly curious as to how he was going to respond.

"Skye, I'm not entirely sure that's such a great idea."

"Oh, come on, A.C. Please?" she whined. "I just got my badge. I can do it, I swear."

There was a long pause as Skye and Coulson stared each other down. Skye was in full puppy-dog face mode, but Coulson must have had a much stronger will than Fitz because he took about ten seconds longer than Fitz usually did to give in. Coulson sighed and Skye broke into a huge smile.

"You listen to every word I say, do you understand me?" She nodded enthusiastically, but Coulson shook his head. "No. I mean it, Skye. You'll stay right by us the whole time. No going off on your own. No taking matters into your own hands. I am your commanding officer, and as an official S.H.I.E.L.D. agent, you're expected to follow orders now. Can I trust you to do that?"

Skye grew serious, but a smile still played in her eyes. "Yes, sir."

Coulson sighed again. "Fine. May, what's our ETA?"

May inspected her tablet. "I can get us on the ground in 45."

"Okay. Everyone get suited up. I want to get this 0-8-4 taken care of as quickly as possible." He nodded at them all before exiting the room, May behind him.

Fitz noticed Ward turning towards Skye, probably to make some sort of objection about her being in the field, but Jemma actually spoke first.

"Skye, please be reasonable. Think about what you're doing. Going into the field so soon after what happened to you is reckless." Fitz didn't even need to look at Jemma to know that she was severely distressed. It was a force of habit whenever one of them was upset, but Fitz automatically moved closer to her so that their arms were barely touching. Her eyes darted over to him briefly, which he knew was her way of thanking him.

"Simmons, it's time," Skye replied. "I can't hide here on the Bus forever. I need to get out there again."

"She's right," Ward said, and Fitz looked over at him in surprise. He would've thought that of all people, Ward would be the one most opposed to Skye joining them.

Skye also looked a little shocked, but she gave Ward a small smile. "Thanks, Ward."

Ward nodded to her in reply. But Jemma wasn't ready to give in.

"Skye, that's all very well, but why now? Can't you just wait a little while longer?"

"Simmons," Ward turned to face her. "She's ready. Every field agent has a moment when they have to leave the nest and learn to fly on their own. If we keep holding her back, she'll never be able to even reach the sky." He winced as they all looked at him with hardly concealed amusement.

"Did…you just make a pun, Ward?" Skye asked in astonishment. Her face was filled with mischievous glee.

Fitz cringed. "Jeez, that was bloody awful." He slapped Ward on the back. "Probably best if you didn't try that again, mate."

Ward glared at him before closing his eyes and taking a deep breath. "Look. I'm not crazy about the idea of Skye going in, either. But I'm her S.O. And whether I like it or not, she's ready."

Jemma didn't look very swayed, but she didn't offer up further argument. Skye took her silence as encouragement because she hit Ward playfully on the shoulder.

"Come on, boss. Let's go suit up."

Ward rolled his eyes and followed her out into the common area. Fitz was going to join them when he felt a hand on his arm, and turned to see Ellie still looking at him with concern.

"Ellie, relax. We'll be in out of there before you know it. Everything will be fine."

"You know I'm going to hold you to that, right?"

He smiled at her. "I'd be disappointed if you didn't."

Ellie laughed a little, but she still looked worried. He saw her eyes wander behind him and she gave his arm a squeeze before leaving the room, the door closing softly behind her.

Fitz sighed before turning around to face Jemma. She simply looked at him for a few moments before wordlessly stepping forward and wrapping her arms around his neck. He hugged her back and rested his chin on her shoulder, taking comfort in the pulse he felt reverberating through her body.

They stood there for a few moments, not saying anything. They didn't have to. Fitz could hear Jemma's anxiety as clear as a bell in his head. No matter how many times he went out into the field, he didn't think she'd ever be fully okay with him in potential danger. She didn't protest out loud anymore, but Fitz knew. He always knew.

"Be safe," she whispered before pulling away, leaving him alone in the conference room with his thoughts.

"Mr. Reid, I'm Agent Coulson with S.H.I.E.L.D. We spoke on the phone earlier." Coulson stepped forward to shake hands with the Denver airport manager.

"Yes, of course. I rushed over as soon as I could. How can I help you?"

Coulson looked over at Skye and nodded. She walked up to the manager and showed him the diagrams she had on her phone. "We've been sent to collect something that could be super dangerous if it's allowed to be anywhere near large groups of people. Our signals are coming from somewhere over here," she gestured towards the east side of the map. "We think it might be in the underground bunker beneath the airport."

She glanced up at the manager's face and nearly took a step back. His piercing blue eyes were so startling that Skye was sure he had to be wearing contacts. Must be a mid-life crisis or something.

"I'm afraid I don't know what you're talking about. All that's underneath the airport is a storage facility."

Skye fought the urge to roll her eyes, and was grateful when Coulson spoke up. "We're well aware of what the official airport statements have said, but we'd still appreciate it if you could let us take a look around. As I said earlier, it's a matter of grave importance."

The manager folded his arms. "And I suppose if I refuse, you have ways of making me cooperate, right?"

Coulson's face remained unchanged, fixed in that terrifyingly calm smile. "I think it'd be best for everyone if it didn't get to that point, don't you, Mr. Reid?"

There was a pause as they all looked at him expectantly. He seemed to think it over before making a decision. "I guess I can bring you down there for a few minutes. But I doubt you'll find anything."

He led them through a maze of hallways and stairwells that twisted and turned so many times, Skye lost track of where they were going. As they descended below the airport, Skye felt the first prick of uneasiness. The last 0-8-4 they'd dealt with had had the potential to create a nuclear explosion. And they were heading into a confined space below the ground? That could hardly be a good idea. And then there was the fact that she herself was also an 0-8-4. What if her 0-8-4ness made other 0-8-4s go wonky? No. That was stupid. Skye focused on taking deep breaths. This was no time to get paranoid.

"Simmons?" Coulson asked. "Are we getting closer?"

There was silence as they waited for Simmons's voice to come through the comms.

"Damn," he said. "We must be too far belowground again."

"We've really gotta invest in some better comms," Skye muttered.

They reached a big metal door that had a sign reading "Restricted Access." The manager paused to ensure everyone had followed him. "This is the east entrance, so if whatever you're looking for is even down here, it'll probably be somewhere behind this door."

"Thank you, Mr. Reid. Would you do the honors?" Coulson pointed to the door. Reid nodded and turned around, inserting a key into the lock and pushing the door open. The room beyond was dim, and Skye couldn't really make out anything. The manager motioned inside. "Have at it."

Coulson turned to look behind him. "Okay. I'll go in first. Ward, you go on my six. Fitz and Skye, you stay in the middle, and May will bring up the rear." He glanced at each one of them to make sure they all understood their tasks. After a moment, he nodded and slowly entered the room.

The light from Coulson's flashlight showed a small cement block. The room was completely bare, but an open doorway beyond gave a glimpse of a larger space ahead.

"Well, this isn't so bad," Skye said, and immediately closed her mouth as she heard the sound of a door slamming behind her. They all whirled around. The manager was gone, the closed metal door in his place. May quickly walked up and tried the handle. She looked at the rest of them and shook her head.

"Damn it," Coulson whispered. "Okay, we'll deal with him later. Right now we need to concentrate on getting the 0-8-4. Fitz, stay here and call out if anyone comes through the door. We'll go into the next room and see if we find anything. But we have to assume we're gonna meet a little resistance. So only come with the D.W.A.R.F.s when I give the all-clear. Got it?"

Fitz nodded. "Yes, sir."

"Okay. Come on."

They inched forward toward the doorway. Skye held her Night-Night gun up near her face, trying not to shake. It was so quiet she could hear her heart pounding. What if they were walking into an ambush? The room beyond was nearly pitch-black, but when Coulson turned his flashlight off, she noticed a blue glow coming from the corner of the room.

Before she make out the source of the glow, she heard a click from somewhere off to her left that made her blood run cold. As her eyes adjusted to the dim light, she slowly turned to see that Ward, Coulson, and May had arranged themselves in a triangle around her.

"I count nine," May whispered almost imperceptibly.

"Copy that," Coulson replied just as quietly.

"The Trifecta Protocol, sir?" Ward asked.

Skye turned to see Coulson nodding. "The Trifecta Protocol." She whipped her head around. All three of them had smiles on their face. She was about to ask what the hell the Trifecta Protocol was when all of a sudden she was surrounded by a blur of motion. She heard a few blows, the distinct whoosh of a Night-Night gun being fired, and a loud crack that sounded an awful lot like bones breaking. Before she knew it, the floor was covered with the bodies of five men.

As her team whirled around her, Skye leaned forward to examine one of the unconscious hostiles. He was wearing what appeared to be an airport security uniform. She glanced at the other assailants. They were all airport security guards.

Something hit her hand and she yelped in surprise, her Night-Night gun knocked out of her grasp. She turned around to see one of the guards standing in front of her, cracking his knuckles. She looked to her sides for help, but May, Coulson, and Ward were all busy fighting the other attackers. She would have to get out of this one on her own.

The guard was taller than Ward, so there was no way she'd be able to twist his arm like she had done earlier. But maybe she could try the technique Ellie had shown her.

Before she could think about it too much, Skye rushed forward and wrapped her arms around his waist, hoping she would surprise him enough to take him down. She felt a tremor through her arms and realized the guard was laughing at her. She moved around to his side and tried to knock his legs out from under him, but he must have realized what she was doing because he lunged at the last second and caught her foot with his in mid-swing.

A searing pain shot up her leg and she stepped backwards, trying not to cry out. She didn't fall, but turned to face the guard again, who was now pointing a gun at her head.

Skye stared at the barrel, frozen. The next few seconds were critical. She tried to remember her training. She just had to pretend it was Ward making her go through the drill again. But all she saw was Quinn pointing the gun at her. The sounds around her faded, the two bangs that had nearly sent her to her death resounding in her head.

In the end, it was thinking of Quinn's stupid face that gave Skye the burst of adrenaline she needed. She would do anything to wipe that look of satisfaction off the face of the planet. She took a deep breath and dodged out of the line of fire, getting under the guard's arm. She successfully took the gun out of his hands and whirled around, turning it on him.

She expected him to raise up his hands in surrender, but he simply smiled at her.

"What are you gonna do, little girl? Shoot me?" He stepped forward and she almost gasped in surprise. His eyes were shockingly blue, the same blue she had seen in the eyes of the airport manager. Something weird was definitely going on. She panicked, her finger on the trigger. The pain in her ankle was almost too much for her to handle, but she couldn't fail. Not again.

"I might show you mercy," she said, trying to act like she had the upper hand. (Well, technically, she did.) "But only if you surrender now."

He laughed at her again. Before she could process his movements, he stepped forward and wrapped one hand around her neck. The gun shook in her grasp as he continued to choke her. Black spots danced in front of her eyes, and she felt like she was going to pass out when all of a sudden she heard the sound of a gunshot.

Skye took in a huge gulp of air as the grip on her neck relaxed. The guard in front of her stared at her face in confusion and then looked down at his chest. Her eyes followed his to the pool of blood that had started to form on his shirt. Skye looked down at the gun in horror. Her hands began to shake, and as the gun clattered to the floor, she clapped a hand over her mouth.

The guard's eyes went out of focus and he began to sway. Skye realized almost too late what was about to happen. As he began to fall forward on top of her, she sidestepped out of the way and screamed, the searing pain in her ankle coming back at full force. She felt herself collapsing, but before she hit the ground, strong arms caught her and gently lowered her to the floor.

"Skye," Ward looked at her in alarm. "Are you okay?"

She looked up at him, eyes still widened in horror, and tried to speak, but no words would come out. The alarm on his face grew and she saw him glance down at her leg.

"Ward!" she heard Coulson shout as he rushed over to them. "Skye! What happened?" She turned her head to see him and May looking at her with concern. She glanced around the room, trying to see if there were any more guards, but her vision was blurred for some reason.

"She's twisted her ankle," Ward replied. "I don't know, it might be a break. I'll take her back to the Bus and have Simmons look at it."

"Okay. Here. Take this for the lock." Skye couldn't see what Coulson had handed Ward, but she assumed it was one of those handy devices he liked to carry around that magically exploded doors.

With one hand still on her back, Ward slid his other arm under Skye's legs and lifted her off the ground. Skye tried to protest, telling him that she could walk just fine on her own. She didn't want to be carried out of her first real mission like some kind of child. As Ward walked towards the door, he glanced down at her.

"Skye, I can't understand what you're saying."

Her vision was still blurred, and when she brought a shaking hand to her face, she realized that she was crying. She raised her voice, trying to tell him to put her down. But the words that were pouring out of her mouth were different from the ones that were going through her head. "I shot him. I shot him. I shot him." She sounded hysterical, but she couldn't stop.

Ward pulled her closer to him and she buried her face in his shirt. Her ankle felt like it was on fire, and her whole body threatened to succumb to the pain. The last thing she heard before she passed out was Ward's voice next to her head.

"Shh, Skye," he murmured. "It's okay. It's going to be okay."

"Fitz, get in here!" Coulson shouted. May looked over at him in alarm. There was something in his voice that was off. Maybe it was seeing Skye hurt again. May had to admit that seeing her collapsed in Ward's arms had made her own stomach drop.

Fitz rushed in and stopped in his tracks. "What the bloody hell happened in here? And what about Skye?" He gestured behind him.

"She'll be fine. Ward's taking her back to the Bus."

Fitz didn't look very convinced, but he nodded. "What've we got, sir?"

"You tell me," Coulson replied, pointing behind him to the object glowing in the corner of the room.

"All right, everyone stay back here until the D.W.A.R.F.s give us some kind of idea of what we're dealing with." Fitz quickly opened the case containing the bots and sent them to work with his tablet.

"Okay…" Fitz said slowly, examining the data coming through. "Yep. Just as we suspected. Sleepy's reading the same radionuclides we found in Peru. It has a functioning power source, and it also seems to be fuelled by Tesseract technology, but it's not nearly as lethal as the other one. Sir, I don't think the photon emissions coming out of it are too bad. We'll probably be able to get it to the Hub without much trouble. But we should still be careful around it."

"Okay. Let's get it and get out of here. I don't like this place."

Fitz retrieved the D.W.A.R.F.s and stored them, grabbing the other large case he had brought with to contain the 0-8-4. He slowly walked towards the glowing object, with May and Coulson following closely behind him.

When they were only a few feet in front of it, May saw Coulson freeze out of the corner of her eye. She glanced over to see him staring at the blue stone with wide eyes.

"Phil?" she asked. He didn't seem to hear her.

"Phil!"

"Don't touch it!" he shouted hysterically, and Fitz turned around in confusion. He had the containment case open, and he had put heavy handling gloves on for safety.

"What is it, sir?"

Coulson remained silent, his eyes fixed on the 0-8-4. May looked between the object and Coulson, and something clicked in her head. The weird blue eyes of all the guards. The strange location. Coulson's shocked reaction to seeing the stone.

May felt dread settle in her bones, the glow instilling a new sense of fear within her. She knew that Coulson had seen that stone before. Right before he died.

In the Chitauri scepter Loki had used to stab him in the heart.

A/N: The Denver Airport conspiracy theory Skye references in this chapter is based on a real conspiracy theory. If you would like to know more, please let me know, and I will be happy to send you some of the sources I used.

As always, thank you so much for reading!