Coast Guard Petty Officer 1st Class Tim Glasure, from Coast Guard Station Niagara, N.Y., stands guard with Border Patrol Agents Azel Price and Matthew Mastrorilli during an active shooter exercise at Coast Guard Sector Buffalo, N.Y., Jan. 29, 2015. Members of the police department, Coast Guard and Border Patrol worked together during the exercise that simulated a real-life active shooter event. (U.S. Coast Guard photo by Petty Officer 3rd Class Lauren Laughlin)