Two U.S. Marines salute each other indoors, one wearing a hat and one not. Marines don't salute without wearing a hat.
The Marine captain wears his hat indoors; Marines take off their hats indoors unless armed with a firearm.
McVeigh's car is shown as blue; it was actually cream-colored.
One of the U.S. Marines pronounces "Guzman" the wrong way. Americans pronounce it as "Gooze-mon" whereas he pronounced it as "Guzz-man".