Where are the explosives coming from? How about taking out the factory no matter what country it is in?
Black market. Trainloads of such explosives are manufactured each year around the world and some gets into the black market. Gun running is a huge business.
Get used to it. Bush has already told us that this war on terrorism will last for decades. We defeated the Axis powers in less time. But defeating a bunch of inbred psychopaths is going to take decades.
None of the families I know with men in this war want to re-up to die in this politically hamstrung quagmire. They are willing to fight, they are willing to die if necessary, but they are not going to be cannon fodder for politicians in a politically hamstrung war. We will sacrifice our sons for freedom, not for political capital.