Bucky Barnes had the grace to look ashamed. He winced at the words Tony Stark threw at him, words that he knew he deserved. He'd done his research when memories started to surface. While he had no control of himself, he could not argue that it was his actions that caused the death of Howard and Maria Stark. HYDRA had seen him as a threat and an enemy, so they had him eliminated. The flashes were dark, violent and he tried not to dwell on them. He didn't remember every death, but he remembered those.

His eyes narrowed, staring at Tony, watching the tremble in his arm. "I don't do that anymore," he stated a little more firmly. He didn't want to have a fight here. And yet, it always seemed to end in a fight, didn't it. His shoulders tensed, he wondered how long Tony would be before he'd have to put his arm down. Soon, it would be too heavy. Soon, he'd have to move and that's when the Winter Soldier would have reacted.

Bucky didn't want to react.

"I'm sorry," he stated. "I... I can't... I'll never..." Bucky sighed. There were no words that were going to make up for what he did, nothing that he could utter to make it right. It was cruel, what this place had done, plucking him here when it knew Tony was here, just to make the man suffer. No matter what the young woman had said, this could not be a mere coincidence.

"I... I don't know what to say."