COMBAT OUTPOST TAGHAZ, Afghanistan – I was lifting weights Tuesday night in the dusty, prison-inspired gym here when Cpl. Byron Willis ran up to two of his fellow Marines. “The dog ate all the cigars!” he exclaimed. Willis, 24, was referring to Sgt. Crank, the improvised explosive device detector dog on post. Willis, Crank’s handler, and the black Labrador retriever are assigned to Weapons Company 3rd Battalion, 8th Marines, out of Camp Lejeune, N.C. The back story: A sergeant had teased Crank with a toy football earlier in the day but wouldn’t let him have it, Willis said today. When…