Airships!

So, what have we learned? That an airship with a top ceiling of 20,000 feet is out of the range of enemy missiles. Gee, and Lockheed really is a defense contractor? In what century? The 19th?

Just so you know: the newest generation of Russian SAMs (the S-400 based 40N6 missiles) have service ceilings of up to 550 thousand feet...