An ambulance enter at a gate to Fort Sam Houston, Monday, June 10, 2013, in San Antonio. San Antonio police have arrested a gunman for shooting at the main gate of the U.S. Army post.

 

              An ambulance enter at a gate to Fort Sam Houston, Monday, June 10, 2013, in San Antonio.  San Antonio police have arrested a gunman for shooting at the main gate of the U.S. Army post.
An ambulance enter at a gate to Fort Sam Houston, Monday, June 10, 2013, in San Antonio. San Antonio police have arrested a gunman for shooting at the main gate of the U.S. Army post. (AP Photo/Eric Gay)