Full Title: U.S. Air Force warns Iran with huge show of strength as 52 fully-armed F-35A Lightning II stealth fighters worth $4.2 BILLION take off in a single wave after 'elephant walk' along Utah base runway The U.S. Air Force has performed a huge show of strength by launching more than 50 fully-armed Lightning II stealth fighters in a single wave following an elephant walk down the runway. The 52 F-35A aircrafts, which are worth a whopping $4.2 billion, took off in quick succession from the Hill Air Force Base in Utah on Monday. The exercise carried out by the...