Does NASA's space shuttle have a callsign? Does it even have a reg. #?
Also, when the shuttle is descending through the atmosphere to land, the crew is talking with Houston, not JSC landing site. So how do they keep out of the way of commercial aircraft flight paths? The shuttle is not powered so they can't just "turn right to 110" or something like that to avoid other planes. And, the shuttle is travelling more than the speed of sound until shortly before landing so there isn't much time!!!!
I've always wondered because they can't really pre-plan the shuttle's descent path because it is based on wherever the last orbit takes it.