I started work in D.C. a few months after 9-11-2001 and there was a lot of hysteria still in the air with the subsequent anthrax mailings, development of 'homeland security', the 'patriot act', and no doubt fueled by posters like the one below appearing at public transit stations, now appearing shamelessly on my wall at work :). MARC is the Maryland Rail Commuter system into DC if you didn't know.
Imagine my surprise when I saw an altered version of it appear on the TTW loading screens. Maybe some of you haven't watched the complete cycle of images, it's there, but not as "Watch, Ride and Report"
It did receive some interesting commentary at the time: http://www.dailykos.com/story/2005/6/7/120078/-