An Iraq war veteran who was grappling with mental health issues opened fire at Fort Hood, Tex., in an attack that left four people dead and 16 wounded Wednesday afternoon, according to preliminary law enforcement and military reports. The gunfire sent tremors of fear across a sprawling Army post still reeling from one of the worst mass shootings in U.S. history. Many basic details about the shooting remained unclear in the chaotic hours after the first calls for help... (GunPolicy.org)