Originally Posted by redjr
Probably because someone could smuggle a dry substance through security(undetected in most cases), and mix it with water, or other fluid purchased airside and voila. They have part of their potentially incendiary mixture.
Pretty much anything you can buy airside you can get on the plane. They have water on the plane (tossing a block of pure potassium into the toilet would probably cause good damage, so I guess we should close off the loo). They also have Diet Coke on many planes. Have you SEEN what Diet Coke does when you drop in Mentos?
http://www.eepybird.com/ DANGEROUS!