Including, of course, the defensive invasion of Afghanistan using article 5.
But go ask random people on streets in the US, Russia or Europe, and they will focus on the "cold war" and the iron curtain and NATO's defense of the west against the threat of Soviet expansion.
The NATO treaty only protects members if they were attacked in Europe or the North Atlantic. If bin Laden had hit the Sear Tower instead of the WTC it would probably not have been a NATO operation.