thanks for the replys.
mostly what ive found agrees with what both of you have said. I think for most air carriers hazardous materials shipments, or DG (dangerous goods?)make up only about 1% or so of their business. Also, theres not a whole lot that can be done about undeclared HAZMAT. Since Value Jet the FAA has spent alot of money tyring to educate shippers and forwarders, as well as providing alot of free iformation. Also they laid down some pretty heavy fines. But still the problem still stands. As was said above, some passenger could throw a bottle of hydrogen peroxide into their luggage and not think anything of it.