FOUR-STAR SALUTE Army Gen. Ann E. Dunwoody, former commanding general of the Army Materiel Command, salutes during the playing of the national anthem at her retirement ceremony on Joint Base Myer-Henderson Hall in Arlington, Va., Aug. 15, 2012. Dunwoody, the first woman in the U.S. military to achieve the rank of four-star general, retired after 38 years of service. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 428789-Y-PSE05-970.jpg Photo Gallery