Just my own guess here, I'd imagine that there's probably an agreement with the United States and Germany regarding use of Frankfurt that would cover all these details like landing fees, scheduling.
Depends on the airport but probably the same controllers will control military aircraft. It doesn't make sense to have two sets of controllers working at the same airport controlling only civilian and only military.
As far as explosives go, most of the ordnance like stuff in GP
bombs is a very stable and is actually hard to detonate. C4 explosives for example, you get set it on fire it will not detonate, however if it's on fire and you stomp on it to try to put it out, it will go boom
if it's not on fire you can use a ball of C4 as a baseball to play baseball with it. it won't detonate, but if it is on fire when you use it as a baseball, there won't be much left of the bat or the batter, or homeplate.
But even then each type of explosive has an ESQD explosive safety quantity distance, which delineates the closest anything or anyone not involved with the evolution can be when handling ordnance. Like for a simple G881 fragmentation hand grenade if I walk down the street with one, it has an explosive weight of say 8 ounces. I have to clear a distance of 1250ft arround me in all directions along the route of travel. in order to transport that grenade according to the regs, of course that's very simplified, I have to make sure its packaged properly, palletized and banded according to the unitizing documents. Have a emergency response team capable of responding within a certain time limit, etc.
Ammunition weighs a lot and I don't expect a lot of it travels by air when we're getting it from on theater to another theather, a surface method is used, it's more efficient. However once it's in a theater of operation, then we use whatever method is necessary to get the ammunition to where it is going including tactical airlift, although principally it will be surface means ususally as well.
Bonus animus sit, ab experientia. Quod salvatum fuerit de malis usu venit judicium.