[Drammach]

Speaking of model rockets..

Model Rocket Fuel is now under the aegis of the BATFE..
Identification, fingerprinting, (probably licensing) is now required to purchase it..

I'll see if I can find an article on it somewhere.

[Drammach]

model rockets and the BATFE:

http://www.space-rockets.com/arsanews.html

BATFE site - Explosives regulations

http://www.atf.gov/explarson/fedexplolaw/index.htm