(A gun rights supporter carries his Ruger model SR9 pistol on his hip during a rally in support of the Michigan Open Carry gun law in Romulus, Michigan April 27, 2014. REUTERS/Rebecca Cook )

(A gun rights supporter carries his Ruger model SR9 pistol on his hip during a rally in support of the Michigan Open Carry gun law in Romulus, Michigan April 27, 2014. REUTERS/Rebecca Cook )