Captain America #619 (Vol 5)

The narratives of "Fear Itself" converge in a breathtaking finale. Within the confines of a frigid Russian prison, Bucky resolves to take a step that will irrevocably alter his destiny. Meanwhile, in the "Steve Rogers: Super-Soldier" narrative, the initial fallout from Bucky's choice threatens to unravel all that Steve has painstakingly built. It's a climactic ending that defies expectations.