Character mistake: When Steve is at the Smithsonian, he reads the biography of his friend Bucky. At the start of the description, the bio reads "Born in 1916...", but at the bottom of the description, it reads "Bucky Barnes: 1917 - 1944." (00:18:35)
Character mistake: When Steve and Romanoff "switch on" Arnim Zola, Zola says "I may not be the man I was when the Captain took me prisoner in 1945." In the first Captain America, it was shown Steve took Zola into custody the same day as his friend Bucky supposedly died. However, the bio of Bucky shown at the Smithsonian earlier in the film said that he died in 1944. (01:00:25)
Chosen answer: Black Widow was turned into an assassin and spy at a very young age. She has killed hundreds of people at the request of the Russian and American governments, in addition to many other horrible acts as yet unspecified..
Greg Dwyer