Washington, April 5 -- As US forces race against time and Iran to locate an aviator shot down Friday, a former Air Force pilot and a rescuer explained what it takes to hide, survive and extract someone behind enemy lines. "You're like, 'Oh my God, I was in a fighter jet two minutes ago, flying 500 miles an hour, and a missile just exploded, literally 15 feet from your head,'" said retired brigadier general Houston Cantwell, who is now at the Mitchell Institute for Aerospace Studies. That said, a pilot's training - known as survival, evasion, resistance and escape (SERE) - would likely kick in before he or she parachutes to the ground. "Your best view of where you may want to go or where you may want to avoid is while you're coming down in y...