The Navy Yards were not a gun-free zone. In fact, the shooter used guns he found there, and the police arrived (with guns) in minutes. Twelve people still died. DC"s laws hardly matter while Virginia and the rest of the country allows the sale of shotguns to people with a long history of mental illness. Let’s count our blessings that Virginia at least prevented him from buying the AR-15 he wanted (not because of any mental problems, but because he’s a Texan).