Author's Note: Wow more followers and reviews! Thanks so much! So it's Lab time for Rhea! Enjoy this one and let me know what you think! I'm open to suggestions as to what to do!

Chapter 6: DNA

Bucky leant back against the wall and watched as Tony sat Rhea down on a table. Bruce wiped down Rhea's arm and told her to take off her jumper. Bucky kept his eye firmly on Rhea, there was something about her that he couldn't put his finger on, and after his dream or memory last night he felt guilty, more guilty then he had before. He had been ordered to kill a child, an innocent child, and he had gone to obey it with out question. What did they do to me? He asked himself.

Rhea gasped and tensed as she felt Tony put the needle into her arm, "Damn Tony! Easy with the needle!"

"Chill, the more you wriggle the more it'll hurt," He told her than turned to Bruce, "So how much do we need again Doc?"

Bruce opened the file he had in his hand and looked through, "About 100ml, then we can start the tests."

Rhea looked down at the needle in her arm and the tube coming out of it, her own blood pumping out into a beaker. She was surprised that Bucky was still hanging around, she would have thought that he would have bolted already.

"So, Frosty? I've been reading up on you," Tony said to Bucky across the room. Oh God Stark, shut up, Rhea willed him to stop. "You seem to be attached to our little Rhea." Tony put his arm around her.

Bucky shifted his position against the wall, "I don't know what you mean." He narrowed his eyes.

Tony laughed, "You haven't stopped looking at her since you all arrived."

Rhea rolled her eyes, "Leave it Tony," She warned, "Look what are these tests for?"

"We need to see what your blood type is and what could be possibly lying dormant in your DNA," Bruce said over his glasses, "Then we can run tests and see how the blood reacts. While I'm doing that Tony is going to put you through some tests on a treadmill and other physical exercises."

Rhea rolled her eyes, "That's all well and good, but you're talking around it Bruce, what is really going on?"

"What is really going on is that we're trying to see if you're a Hydra sleeper agent." Rhea whipped around and saw Nick Fury walk through the door on the far side of the room. She looked over at Bucky, his eyes were wide, he was remembering what he did to Nick last summer, Crap, this isn't going to end well, Rhea said to herself, Please Bucky don't freak out.

But Rhea was proved wrong, "A sleeper agent?" Bucky asked Nick, looking him in the eye.

"Yes Barnes, a sleeper agent. I don't know what programming she already had done before I got her out of that base in Siberia." Nick glared at him.

Bucky moved him his position, "She is not a sleeper agent."

"Oh? And how can you be sure? You don't even remember your own name kid!" Fury was getting irritated.

"Because I do remember, they didn't even run tests on her, they just told me to get rid of her, let the wolves have her," He said, a disturbed look on his face.

Fury turned to Rhea, "Is this true?"

Rhea nodded sheepishly, "I think so, I've been having a nightmare about something like that since I was a kid, same dream. And then Bucky remembers it, so it must have some truth to it."

Fury shook his head, "They just keep getting more and more insane," He said almost to himself, then he looked up, "Right we need to get moving on this."

Rhea finished giving her blood then she was told to have a chocolate bar, to get her sugar levels back on track, and then she was told to change into a pair of shorts and a high cut top so the machine could monitor her. Rhea took the clothes and slipped into the changing room, right so I have to walk out there in pretty much nothing to a room full of men, oh yeah, because that is totally normal, She rolled her eyes to herself, pulling on the shorts.

She walked out of the room and all eyes turned to her, she sighed and walked over to the treadmill, then clapped her hands, "Guys! Front and centre! Come on!" Tony coughed and along with Bruce began to attach the wiring on to her chest and head.

"Right we're gonna start off at a jog, then as we go I'll increase the pace of the treadmill, you tell me if you can't keep up and I'll slow it down," Tony told her and took the controller in his hand, "Ok here we go."

Rhea felt the treadmill start underneath her, she looked over at Bucky who was still against the back wall, she picked up a jog, feeling her way into the rhythm.

"Ok I'm gonna crank up the speed," Tony told her and turned the dial.

Rhea increased her speed, something caught her eye on the far side of the room, she grinned, Steve. She didn't think she'd be happy to see him but she was. She jogged on and broke into a run.

"Faster?" Tony asked. Rhea nodded, her legs moved with the speed of the treadmill. She saw Steve come nearer to the group, he looked a little surprised, then she saw Bucky had taken a few steps closer.

"Again?" Tony said.

"Yeah," Rhea nodded and pushed back against her heels to keep pace.

Tony shook his head, "Heart is pumping as if she's just jogging, respiration rate pretty much normal," He sounded a little freaked, then turned to Rhea, "Faster?" Rhea nodded and pushed on, her feet pounding down on the treadmill, she grinned, she loved this, running, running as fast as she possibly could, feeling like everything was behind her.

"Ok, nicely done kid," Tony said and began to slow down the treadmill, Rhea slowed her paced to a jog then to a walk and then stopped. She was breathing a little heavily but nothing too serious.

"So what was that Stark?" Fury asked.

Tony looked at the data that came up on the screen and ran his hand through his hair, "Eh…. Nick…. she was clocking about 40m/ph… yeah." He looked up at Rhea.

Rhea stared at the data, 40m/ph that couldn't be possible, she was a fast runner but that was… un-human. She looked over at Steve and Bucky, both were staring at her. She gave a small grin then stepped off the treadmill, "What's next?"

Tony had her lifting weights, it seemed that 80kg was all she could lift, and after a number of other tests Rhea was finally allowed to sit down. She plonked down on a bench and wiped her forehead with her hand. Steve sat beside her, "So, did you know you could do that?" He gestured to the machines.

Rhea shook her head, "No idea what so ever." She looked over for Bucky, he was pretty much in the same place, "Bucky," She called to him and beckoned him over. He looked at Steve and then looked at the floor. Rhea rolled her eyes and stood up, she walked over to him and took him by the hand, "Come on." She led him over to Steve.

Bucky looked down at the hand Rhea grabbed, it wasn't his normal one, she took the metal hand, but she didn't flinch or ask. He followed her over and stood behind her.

"Oh for Christ sake," Rhea crossed her arms, "I believe you know each other?" She motioned to each of them.

Steve looked at Bucky and stood up, he looked his old friend up and down, then took a step towards him, "Buck, I'm so sorry, I should have tried to find you."

Bucky shook his head, "What happened happened Steve, I have to keep telling myself that every day, each time I think about all those people that I killed, I have to try and push forward, even though I did those awful things…." He trailed off. Steve suddenly stepped forward and wrapped his old friend in a hug, Bucky tensed then relaxed.

Rhea grinned, "There we go, friends again, bromance it out guys, I'm off to see if I'm a genetic mutant." She walked over to Tony and Bruce who were still looking at her blood work. "So any news?"

Bruce looked up, "None yet, but we're still compiling, don't think we're going to have anything until tomorrow."

Rhea sighed, "So I'm meant to stay here all night?"

"Looks that way kid," Tony said to her, "JARVIS, I'm starving, can you put in an order for pizza?"

"Right away sir," JARVIS answered.

"Me too!" Rhea said, "Extra cheese." She walked around to the window and looked at DC in the distance, it looked so peaceful and quiet, not like the storm that was going on in her head. She jumped when she felt a hand on her shoulder. "Steve! You scared the crap outta me."

"Sorry," He said, "Look we have to talk about all this." He tilted his head in the direction of the lab.

"Ok before you start, if you want nothing to do with me that's fine, I totally understand. If I had a clone I probably couldn't look at it, I'd find it all gross, and I know that you had nothing to do with it, come to think of it, it was all SHIELD and Hydra, but I mean….Why are you hugging me?" Steve had cut her off in mid sentence and wrapped her in a hug.

"Because you were babbling," He said, she could hear his voice vibrate in his chest, "Rhea I know that this is all new and scary but I want you to know that I don't find you 'gross', I always wanted a little sister and well know I have one, well a twin that is seventy-one years younger than me." He smiled down at her.

A wave of relief washed over Rhea, she thought that Steve would be furious and he would never speak to her again, "You really mean that?"

"Every word," He nodded.

"Well big bro, hows Bucky doing?" She asked looking over at the still rather tense figure in the corner of the lab.

"He's completely disturbed and frightened. His emotions are all over the place, he says he keeps getting flash backs of what he did to people in the past. I just can't imagine what he went through," Steve said quietly.

"Steve, it wasn't your fault," Rhea said putting her hand on his shoulder, "We just need to help him some how."

"Well you've managed to do more in the last 24 hours for him than what Sam and I have been trying to do for the last six months," Steve raised his eyebrows.

Rhea nodded, "Yeah I mean I literally just bumped into him, and I've kept running into him ever since. Then when I asked him he just followed me here, I didn't think he would."

Steve ran his hand through his hair, "Well maybe we can use that, build on it and try and get him on an even playing field again."

Rhea looked over at Bucky, she bit her lip, then shook off a feeling, "Sounds like something I could do."

"The pizza has arrived," JARVIS called out.

Rhea bolted to the elevator and grabbed the boxes off the poor unsuspecting pizza boy, "I got it." She grinned.

Rhea sat crossed legged on the floor, a pizza box laid out in front of her. She took a piece of pizza in her hand and began to eat it slowly, thinking. She had been watching Bruce and Tony work for the last five hours, they only took one break. Steve had left, Natasha called him, there was a situation in New York that he had to deal with, The perks of being Captain America, Rhea thought. A sound of someone sitting beside her broke her thoughts, she looked up from her thoughts and saw that Bucky was sitting opposite her.

"Hi," She smiled at him, "You must be starving, here." She offered him the pizza box. Bucky eyed it suspiciously, the he reached out and took a slice, biting down slowly, "Good isn't it?" Rhea said to him.

He looked up at her and nodded, "Yeah not bad."

"So," Rhea put the crust back in the box, "What's your plan?"

Bucky looked surprised, "Eh, I don't really know."

"Bucky, you can't wander around the world for the rest of your life. I mean you got skills, you can use them. The Avengers could use you." Rhea said gesturing back to Tony and Bruce.

Bucky moved his position, "I don't know, my skill set isn't really appropriate."

"You can make it whatever you want it to be, you are free now," Rhea reached out and put her hand on his knee. "No one can hurt you any more."

Bucky looked over at Rhea's blue eyes, they were back to that vibrant blue that he saw before in the museum.

"Hey, you two, up off the floor." Nick Fury called to them.

"When did he reappear?" Rhea murmured to herself.

"So, we have the results of your blood work done Rhea," Bruce said to her, and looked down at the notes in his hand, "And eh JARVIS, can we get the data on the screens?" A screen appeared and suddenly there were equations and numbers that were flying around, none of which made any sense to Rhea. "So what we've found is that you are genetically identical to Steve as we thought, DNA, blood type etc. But there are some differences in other aspects as we've found." He changed the screen, "We found this. It's a genetic code that is varied and from the studies I've done and what Tony has been able to uncover is that with an injection of a serum the genetic code should unlock, and well, you'll have the same abilities as Bucky, you'll be stronger than Steve, and faster as we've already seen."

Rhea was silent, she didn't know what to think, she looked back at Bucky, he was equally shocked. "I…. I don't know what to say."

"I'm as confused as you are kid, but the reality is we need to control this gene, it could mutate into anything if it isn't used properly." Tony said to her.

"So what you're saying is; I get this injection and become a super-what-ever and my life is changed, or I leave it and face turning into some thing worse?"

Tony nodded, "Pretty much."

Rhea gulped, she looked from Bruce, to Tony, to Nick and then to Bucky. She took a breath, "Well then…. prepare that serum Stark."