Petty Officer 2nd Class Bryan Patrick, an aviation maintenance technician stationed at Coast Guard Air Station San Francisco, performs a safety and functions check of the M14 rifle Tuesday, Dec. 22, 2009, prior to departing for a ports, waterways and coastal security flight. Arial gunners from the air station completed their final phase of initial PWCS training evolutions in June 2009 and continue to remain vigilant against threats of terrorism.