Yep, Momma, we are talking about the same movie. Signs was about an alien invasion and how peaceful everyday life was suddenly amd unexpectedly threatened. In the immediate aftermath of the 9/11 attacks in Washington, it certainly seemed that life had changed for good. There was a profound fear of more attacks and an a general sense of anxiety in the city. The unknown was frightening and for a while it seemed as if we were under siege.
Now you must understand that I live three blocks from the White House. I woke up on 9/12 to the sound of armored vehicles on the street outside my window and for a week there was a highly visible National Guard presence in downtown Washington. Fighter jets patroled the skies over Washington for a couple of months. Streets were closed and rerouted. The 9/11 attacks were traumatic for the whole country, but they really did change life in Washington and New York.