SOLEMN SALUTE Vice President Joe Biden, accompanied by Maj. Gen. Karl R. Horst, commander of the Military District of Washington and the Joint Force Headquarters, National Capitol Region, salute at the playing of Taps by the lone buglar during Memorial Day ceremonies, at the Tomb of the Unknowns, Arlington National Cemetery, Va., May 31, 2010. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 360823-U-OGL37-336.jpg Photo Gallery