Shoe Bombs

I've actually had enough free time to read a book. Although I'm not finished with 'The Man Who Warned America' I have read enough about Ramzi Yousef to be significantly impressed with this whole shoe bomb thing.

To put it briefly, Yousef got busted and they found his computer describing his elaborate plans to sneak explosives onto commercial aircraft. So while most of us were laughing at the British guy they arrested with the shoe bomb, Yousef showed that it could be a very capable weapon.