DanaC • Apr 27, 2011 6:42 am
Apparently some of the key evidence against those accused of such is....*drumroll* owning one of these:

http://www.bbc.co.uk/news/magazine-13194733

Leaked files reportedly reveal a certain Casio watch was viewed with suspicion by US officials as a possible sign of terrorist links. So how did the humble F-91W find itself in such a position?
They retail for as little as £7 ($12), are water resistant and have a battery life of approximately seven years. Just three things that have helped make the Casio F-91W a global bestseller.
Now this unassuming, black, plastic, digital timepiece has found itself in the news for a different reason. Leaked US documents reportedly advised interrogators at Guantanamo Bay that possession of the F-91W could be a link to bombing by al-Qaeda.
The Guardian, which obtained the leaked files, reports that wearing one has been a contributing factor to the continued detention of some prisoners, with more than 50 detainee reports referring to the watch.
http://www.bbc.co.uk/news/magazine-13194733