Sources told Fox News that after guard took away his gun, the suspect said, "Don't shoot me, it was not about you, it was what this place stands for."Hey James, here's a clue about the gunman's motive: His statement that "it was what this place stands for".Authorities were treating the attack as a case of domestic terrorism, although James McJunkin, the head of the FBI’s Washington Field Office, said authorities do not yet know the gunman's motive.