Severely flawed... but still interesting
SPOILER
1) the General could have ordered all the tanks back to beyond the tree line to remove the sniper positions... which they were in fact suspicious of.
2) Overall, for such a well executed plan to capture the silo, he had an extremely lousy plan for getting away. Unlikely that he wouldn't have thought this through more carefully.
3) He could have had the President give the speach first and then provide proof that it was in fact live and received by the press.
4) Only the President knew that there were only 2 of the 3 convicts left alive. Why did they shoot the 2 survivors knowing that a 3rd could be left inside to launch the missiles in the event of foul play? And YES i'm going to assume that the General would have rigged a device to let one man control both key positions at once.
On the other hand, the government would most likely have dropped several nuclear bombs on top of that silo and wiped them all out within 15 minutes of the silo having been captured and confirmed free to launch.
Also, i doubt that they would ever have got the combination to the safe. Those guys are screened for that type of mission and well trained.
Still I enjoyed this movie because there's probably some truth in the general reactions of the people with power.
a) They will resist honest and open government (i.e. resits a reduction in their own power) and will kick and scream all the way to their graves defending that power.
b) The President was manipulated by all of them to serve them and not the people.
c) The President had to die. One could assume that McKenzie had agents in place to make sure the President didnt escape the assault. The Vice President now takes over and will be ignorant of the "credibility" document. That document would never see the light of day.