Long past midnight, Carl Weston sat in a ditch in the Sonoran Desert with his finger on the trigger of his M-16, waiting for something to happen. Growing up, he’d always played army, dreamed about traveling around the world and taking on the bad guys — the black hats who ran dictatorships, invaded neighboring countries, or tried exterminating whole subsets of the human race. That was what soldiering was all about. Taking care of business. Carrying the big stick and dishing out justice.