Lt. Col. Paul Cairney, commander of the 48th Security Forces Squadron at RAF Lakenheath, England, passes a U.S. flag to Trish Alden, widow of U.S. Air Force Senior Airman Nicholas Alden, during a ceremony marking the one-year anniversary of the Frankfurt Airport shooting in Germany. Two U.S. airmen, including Nicholas Alden,were killed and two were wounded when Arid Uka fired on them as they waited to take a bus to Ramstein Air Base on March 2, 2011. At left is Staff Sgt. Trevor Brewer, who was among those on the bus.