One slight error in the portrayal of Kirk Douglas's colonel character leaving Fredric March's President character: the colonel would salute the President when leaving, but the President, as a civilian, should not return the salute. I do wonder if that was intentional.
We have Reagan to thank for the odd custom of Presidents returning salutes. I went into the air force at the end of his presidency, and the etiquette was explained to me clearly when VP Bush visited.