NEWPORT, Ind. (AP) - Army contractors halted operations Saturday at a western Indiana complex built to destroy a deadly nerve agent after nearly 500 gallons of caustic wastewater spilled in a contained area. No workers were injured or exposed to the hydrolysate, a byproduct of the destruction of the agent, when it leaked onto the floor of a sealed area at the Newport Chemical Depot, depot spokesman Dennis Lindsey said. The facility was to be shut down until the spill was cleaned up and its cause determined, Lindsey said. The western Indiana facility destroys the Cold War-era chemical weapon VX...