Two American servicemen were killed last week on as signment overseas. No, not in Iraq or Afghanistan, but in Frankfurt, Germany, for the simple act of getting on a bus. A lone Muslim gunman opened fire on the unsuspecting airmen at the Frankfurt airport, killing Nicholas J. Alden and Zachary R. Cuddeback and wounding two others. He shouted "Allah Akbar" as he shot -- making it plain he was murdering in the name of his god. A few days earlier, four Americans sailing in the Indian Ocean on a mission of Christian mercy -distributing Bibles to remote churches -- were...