So, did Baghdad Bob make it to North Korea? I don't believe NK has the ability to shoot down a Spad VII, much less a US spy plane. Besides, the RC-135 is not like the SR-71. It looks into enemy territory from outside. No need to violate airspace.
The administration and the UN will do nothing about this, even if the missile is equipped with a nuclear warhead and lands on Pearl Harbor. Sanctions? Nobody trades with NK anyway. The UN is incapable of using force, so it will be left alone.