MSNBC - Guantanamo prisoners could be moved to U.S.
Visit this link and scroll down to find the "INTERACTIVE" box on the right hand side. You can pretend you're an airport baggage screener for two minutes.
(I found all the threats, but also had a few false alarms, and I took too long, as judged both by my end score and the complaints that ensued during my two minute period. (Yes, you get to hear the passengers complain if you don't do it fast enough.))