A WOUNDED US soldier seen on TV shooting dead an Iraqi prisoner was defended last night by SAS hero Andy McNab. The US marine — shot in the cheek earlier — machine-gunned the man in the head as he lay bleeding in a mosque in Fallujah. The soldier feared the Iraqi was pretending to be dead to draw him into a trap. Just before the killing, a fellow GI yells: “He’s f***ing faking he’s dead!” Walking away ... victim is obscured by fellow captive after burst of gunfire The marine faces a murder probe. But McNab — who has stared...