Former service members and civilians are following a national trend of taking up arms to guard their neighborhood military recruiting centers after the shooting of four Marines and a sailor in Chattanooga, Tennessee.

Military personnel are not permitted to carry service weapons in public locations, and citizens have responded.

Charles Gerhardt, a self-described Marine veteran expressed his condolences Friday, at the U.S. Armed Forces Recruiting Center outside of Cincinnati, Ohio. In North Carolina, two veterans are standing outside a Charlotte Army recruiting center.

Civilian armed guards have also been reported in Georgia, Alabama.