Local television showed two damaged vehicles near a gate and emergency workers loading an injured uniformed man into an ambulance. (AP) By Dana Hedgpeth, Sari Horwitz and Ellen Nakashima-March 30 at 2:40 PM One person was killed and another was injured Monday morning when police with the National Security Agency opened fire on a vehicle whose driver refused commands to stop at a security gate, according to a statement from the agency. Shooting at NSA Headquarters Leaves One Dead by Thavam Ratna