Trivia: Michael Fassbender plays Evan Peters' father in the film, even though in real life he's only 10 years older than Peters.
Trivia: Although Anna Paquin has a major listing in the closing credits, she only has three seconds of screen time and not a single line of dialogue.
Trivia: The woman who Wolverine wakes up beside in 1973 refers to him as Jimmy - in the comics and X-Men Origins: Wolverine, his birth name is James.
Chosen answer: Government agents were previously aware of mutants - they are probably the same ones that imprisoned Magneto, and his attempt to prevent JFK's assassination was most likely covered up due to the revelation that Kennedy was a mutant. Magneto was already in prison by the time Trask pitched his Sentinel idea to the government, which is probably why the program wasn't instituted.
Phaneron ★