I believe you mean "The Siege", not "Under Siege".
Actually, "The Siege" would be an excellent film for every American to rent now. It does a surprisingly good job of covering such issues as how reactions to terrorism (including martial law) can cause more damage to this country than the terrorism itself, how we create some of our own foreign enemies, and how vulnerable America is (and probably always will be) to terrorism.
And prophetically, the scenario in "The Siege" is a series of bombing attacks in New York City, including the destruction of a (mid-rise) skyscraper.