SIBERIA
Steve watches Tony anxiously. Tony lunges towards Bucky, Steve stops him.]
Steve Rogers: Tony. Tony.
Tony Stark: [Consumed with grief and tears glistening in his eyes he turns and looks at Steve.] Did you know?
Steve Rogers: I didn't know it was him.
Tony Stark: Don't bullshit me, Rogers! Did you know?
Steve Rogers: Yes.
[Tony steps back, his chin jutting upwards twitchy. Tony reengages the Iron Man helmet. He punches Steve to the floor and deflects gunfire from Bucky, disarming him. he grabs Bucky and flies across the chamber. He slams him onto the floor, then jumps on his arms. Steve's shield hits Iron Man, distracting him. Steve barges him backwards, Iron Man shoulders him to the floor and shackles his ankles. Bucky punches Iron Man who just lifts him and slams him against a machine. Iron Man raises a fist but Bucky twists it. A rocket shoots out of Iron Man's arm, a fireball explodes. Steve slices his shackles as a towering structure of pipework collapses. Tony and Bucky are thrown down a level as twisted metal falls around them, showering sparks.]
Steve Rogers: [to Bucky] Get out of here!
[As Bucky bolts Iron Man fires, but misses. Steve lands in front of him. Bucky hits a control panel and the silo-styled door overhead starts to open.]
Steve Rogers: It wasn't him, Tony. Hydra had control of his mind!
Tony Stark: Move!
Steve Rogers: It wasn't him!
[Steve grabs Iron Man's ankle in mid air and smashes it. Iron Man blocks Steve by shooting down rubble, then falteringly flies up the tower.]
JARVIS: Left boot jet failing. Flight systems compromised.
Tony Stark: Ah crap.
[Above him Bucky leaps from platform to platform. With stuttering jets Iron Man gives chase, then kicks Bucky and takes aim, but the energy bold rebounds off Steve's shield onto himself. Iron Man drops like a stone and lands on a lower platform.]
Steve Rogers: He's not going to stop. Go.
[As Iron Man soars upwards, Steve leaps and shoots a wire which wraps around Iron Man's neck and drags him back down. He deflects Steve's shield, then tries to target Bucky.]
Tony Stark: Come on, come on.
JARVIS: Targeting system's busted, sir.
Tony Stark: I'm eyeballing it. [His helmet retracts and he shuts one eye, taking aim at the opening hatch. He fires and hits the giant hinge which explodes, cutting of Bucky's escape route. He flies up, blocks two swings from an iron pipe from Bucky, then grabs him around the neck from behind.] Do you even remember them?
Bucky Barnes: I remember all of them.
[Bucky pushes them both from the walkway, Steve jumps into them to deflect their fall. Bucky lands on a platform while Tony and Steve land on the concrete floor besides opening in the wall where snow drifts in from outside]
Steve Rogers: This isn't gonna change what happened.
Tony Stark: I don't care. He killed my mom.
[They trade punches and Iron Man ends up pinning Steve down. Bucky picks up Captain America's shield and leaps down to help. As the two super soldiers fist fight with Iron Man the shield changes hands between them until Tony manages to zap Steve who is thrown back into the wall. Bucky struggles to hold Iron Man at bay as he unleashes an energy beam, then he forces Iron Man against the opposite wall and grips the glowing core in the chest of the Iron Man Suit. A blast of energy knocks Bucky down, metal arm completely blown away. Tony zaps him again. Steve rushes him with his shield up and Iron Man fires right at it]
[Tony and Steve are still fighting in the silo.]
JARVIS: You can't beat him hand to hand.
Tony Stark: Analyse his fight pattern.
JARVIS: Scanning! [Iron Man's HUD flashes red as Steve lands blow after blow.] Countermeasures ready.
Tony Stark: [He grabs Captain America's shield.] Let's kick his ass. [He flings the shield away then zaps Steve backwards, head over heels. Steve rises and Tony blocks his punches then zaps him to his knees, right in front of Bucky who's lying on his back.]
Steve Rogers: He's my friend.
Tony Stark: So was I. [He punches Steve then throws him back towards the gaps in the wall.] Stay down. Final warning.
Steve Rogers: [He struggles to his feet, his face bloody and his gate weary. He raises his fists and stares Iron Man down.] I can do this all day.
[Iron man raises his left palm ready to fire. Bucky grabs his leg and Tony spins, kicking him in the face. Steve grabs Iron Man and lifts him over his head, then throws him down, punches him and bashes his mask off with his shield before striking down hard on the suit's looks horrified and glowers fearfully at Steve who pants for breath. Both have blood spattered across their faces. Steve looks back at Tony then shuts his eyes and slumps down. The shield remains upright, stuck upright in the center of the Iron Man Suit. When Steve struggles up again he takes hold of the shield, gripping the edge and pulling it free. He steps away from Tony who rolls painfully onto his side. Bucky lies bloodied but conscious, Steve reaches out and pulls him to his feet, holding him up as Tony looks on.]
Tony Stark: That shield doesn't belong to you. [Steve turns his back.] You don't deserve it. My father made that shield! [Steve stops, raises his chin, then drops the shield and walks away with Bucky's arm around his shoulder.]