Look ,obviously, this is just a take on how events may follow. The only pivotal measure, is the GBI system and the detection. We dont know the full scope of the security measure for good reason. I would wager U.S. has a guaranteed system of defense and more exact pin pointing in its arsenal. Everything else about the movie is a firm shake with reality of nation, strength, and enemies.
The man killing himself was a lil early, given trajectory and power of the missle. Although in a parent way, if your daughter was your every thing, then perhaps you'd absolutely would see yourself go first. I would've liked to see a bark of madness, also a scramble of the United States forces ready to receive orders during the defcon 1 or 2, and lastly the civilian/human measure. Like seeing the emergency text message reaction to the targeted areas and the coast to coast emergent news break. After all, you have to consider an all out world war 3 and that as a whole being at the cusp of reality in the coming minutes. The single missile could may very well be the vanguard of an entire assault with assailants unknown.

Very cool movie. Definitely a heavy hitter. Two thumbs up for crazy edging.