They stand for Zac
Patriot Guard Riders lead the funeral procession route of Airman 1st Class Zachary Cuddeback March 12, 2011, in O'Fallon, Ill. Airman Cuddeback and another Airman were killed March 2 when a man opened fire on a bus carrying U.S. Airmen at an airport in Frankfurt, Germany. Airman Cuddeback will be laid to rest next to his grandfather at a cemetery in O'Fallon, Ill. (U.S. Air Force photo/Staff Sgt. Brian J. Valencia)