KANDAHAR AIRFIELD, Afghanistan (Reuters) – Fast food joints where soldiers wolf down burgers and pizza will soon be a thing of the past at bases in Afghanistan, as the U.S. military reminds soldiers they are at war and not in "an amusement park." In the sprawling military base at Kandahar, the fast food outlets facing the axe include Burger King, Pizza Hut, and the U.S. chain restaurant T.G.I. Friday's that features a bar with alcohol-free margaritas and other drinks -- all set along the bustling "Boardwalk" area of the base. ---SNIP--- The U.S. military says its beef with the burger...