Chief Master Sgt. Juan Villareal, 433rd Aircraft Maintenance Squadron first sergeant, poses for a group photo with past and present chief master sergeants attending his retirement ceremony Feb. 12, 2011 at the Inter-American Air Forces Academy Auditorium at Lackland Air Force Base, Texas. Chief Villareal enlisted in the Air Force in 1978 and retired from active duty in 1992 as a master sergeant. After a 6-month break in service, Chief Villareal joined the Air Force Reserve and remained a member of the Alamo Wing until his retirement. (U.S. Air Force photo/Senior Airman Luis Loza Gutierrez)