James Buchanan Barnes (Earth-199999)

Battle at the Triskelion

When Project Insight, Hydra's plan to use S.H.I.E.L.D.'s highly-armed to massacre any possible threat to their new world order, was about to be launched, Captain America and his allies arrived to the Triskelion in order to stop Hydra, and the Winter Soldier was deployed once more to stop them. After two of the three Helicarriers were reprogrammed, Bucky moved to stop Captain America and Falcon at the third. Bucky managed to damage Falcon's wings and drove him off. Then he turned on Steve while Steve tried to make him remember his past. Rogers managed to replace the chip, which in turn caused the Helicarriers to target each other, and the assault soon had all three falling from the sky.

The Winter Soldier became trapped under debris caused by the barrage, yet Steve still took the risk to rescue him. As soon as he was free however, he attacked again. Steve refused to fight against him. Instead, he dropped his shield and removed his helmet, telling Bucky he wouldn't fight him because Bucky was his friend. Neither the unmasking nor Steve's reminders served to break through the brainwashing, however, and Bucky attacked. Instead of fighting back, Steve allowed himself be brutally beaten, but reminded Bucky that he was his friend. Bucky responded by saying Steve was his mission. But before Bucky could deliver the final blow, Steve told him to finish it, then, because he was with him "until the end of the line", quoting a statement that Bucky had made to Steve decades before, after the death of Steve's mother. The quote combined with the familiar sight of Steve's battered face broke through the conditioning and confused Bucky enough that he halted his attack. However, the vessel broke apart and Steve fell from the deck into the Potomac River. The Winter Soldier leap in after Steve, rescued him, and left him by the side of the river before disappearing.