
Law enforcement officers respond to the scene of a shooting at the Washington Navy Yard in Washington, September 16, 2013. Several people were killed and others injured when at least one gunman opened fire at the U.S. Navy Yard in Washington D.C. on Monday, authorities said. One Navy official said that four people had died and eight others were injured, but other officials suggested caution over those numbers saying the situation was in flux. (REUTERS/Jason Reed)