SAN ANTONIO — His first glimpse in the mirror was largely a blur. Sgt. Darron Mikeworth had just come out of a drug-induced coma _ his mind was still in a fog and he was so weak he could barely stand. Three weeks before, in Iraq, a suicide bomber had raced up to the right side of his Humvee, igniting a barrel of explosives that tore into the machine gunner's face.