The U.S. Air Force Honor Guard practice for the Chief Master Sgt. of the Air Force Transition Rehearsal at Joint Base Andrews, Md., Jan. 23, 2013. Tomorrow, Chief Master Sgt. James A. Cody will become the 17th CMSAF following the retirement of Chief Master Sgt. James Roy. Roy's retirement will culminate more than 30 years of service. (U.S. Air Force photo/ Staff Sgt. Nichelle Anderson)