CNN  —  It started in the pub, over a couple of beers. Four ex-military friends had been speaking about taking on an adventurous trip to raise money for a veterans’ charity , when one brought up the prospect of summiting Everest. “We’re all busy people. My response was, ‘No way I can spend four to six, maybe even eight weeks out climbing Everest — it’s just almost impossible,” Al Carns, a British lawmaker told CNN. But one of his friends had a counter challenge: he had heard about a novel way