SEAC FLAG U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, presents U.S. Army Command Sgt. Maj. William J. Gainey, senior enlisted advisor (SEAC) to the chairman of the Joint Chiefs of Staff, with the SEAC flag during Gainey's retirement ceremony, Fort Myer, Arlington, Va., April 25, 2008. Gainey retired after 33 years of service. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 071944-A-PHE14-260.jpg Photo Gallery