Gene Kranz: I don't care about what anything was *designed* to do. I care about what it *can* do.
During the Engine 5 cutoff, they show the abort handle unarmed. However, it is required that the abort handle be armed throughout the entire launch.
The Captain of the Iwo-Jima who Tom Hanks talks to at the end of the movie is the real Apollo 13 astronaut Jim Lovell.