I'm trying to remember the title of a movie I saw years ago, in the late 70's or sometime in the 80's. I think it starred Peter Strauss as an FBI agent trying to foil/uncover a terrorist plot in the United States. Appreciate any help.

Thanks in advance

Under Siege (1986) (http://www.amazon.co.uk/Under-Siege-Peter-Strauss/dp/B001HRM1CU)