Photos: Union Station attack

Police and emergency responders stand outside a McDonald’s located inside Union Station in Washington, Friday, Sept. 11, 2015.

(Evan Vucci / AP)

Associated Press

Sept. 11, 2015 11:32 AM PT

Police and emergency responders stand outside a McDonald’s located inside Union Station in Washington, on Sept. 11, 2015.

(Evan Vucci / AP)

Police officers stand outside Union Station in Washington on Sept. 11, 2015.

(Lauren Victoria Burke / AP)

Police and emergency responders stand outside a McDonald’s located inside Union Station in Washington on Sept. 11, 2015.

(Evan Vucci / AP)