This is unique in that movies showing The White House being attacked are very rare. I can only remember one in fact, Independence Day. I also saw this concept explored only once elsewhere... one of the seasons of 24 (a favorite of mine). The amount of violence is quite unexpected, and very sudden, though it could have went even further (e.g. killing son of president). The overall movie, however, feels... inadequate. It lacks interesting performances, and the acts of the villains are left pretty much unexplained. The pro-American stance, "we will emerge victorious no matter what", is intensely annoying, though not to the levels of Independence Day.