Flying low over the dangerous and impenetrable Laotian jungle on a bombing mission against the Viet Cong, U.S. Air Force Colonel Eugene Deatrick saw a lone figure waving to him from a clearing below. He continued on his flight path, but ten minutes later - puzzled that a native in this hostile terrain would try to attract his attention - he decided to turn back for another recce. This time, he saw the letters SOS spelt out on a rock. Beside them stood an emaciated man dressed in rags, waving the remains of a parachute over his head and signalling...