Chief Master Sgt. John C. Youngblood, the C-17 maintenance chief with the 176th Maintenance Squadron, celebrated his retirement at a ceremony on Joint Base Elmendorf-Richardson, Alaska, May 7, after more than 30 years of service . Youngblood spent his entire career in the 176th Maintenance Group of the Alaska Air National Guard's 176th Wing. (U.S. Air National Guard photo by Tech. Sgt. N. Alicia Halla/released)