The Air Force has asked Congress to scrap the A-10 in nearly every budget since 2014. Congress refused to kill the fleet every time. Then a war broke out in Iran this year, the jet the Pentagon called obsolete flew the rescue of two downed F-15E airmen, and in April the Air Force reversed itself and extended the Warthog to 2030. The plane is a gun with wings bolted on. Fairchild designed the airframe around the GAU-8 Avenger, a seven barrel 30mm cannon that runs 19 feet long and weighs about…