Avengers Headcannons

JFK's death

Steve, Bucky, Natasha, Clint and Sam were discussing conspiracy theories and ended talking about the JFK assassination. Steve and Sam are adamant that it wasn't an inside CIA job. Natasha's pretty sure the KGB had nothing to do with it. Clint is microanalyzing all the details like shot trajectory, line of fire, etc... Steve sees Bucky sitting quietly, thinking over Clint's analyzations and asks him "Hey Buck, who do you think shot President Kennedy?"
Bucky looks up and quietly says "I think I did" and the whole room goes silent.