BIRTHDAY WREATH Army Secretary John M. McHugh, front right, Army Chief of Staff Gen. George W. Casey Jr., front center, and Sgt. Maj. of the Army Kenneth O. Preston lay a wreath to honor the Army's birthday during a full-honor ceremony at the Tomb of the Unknowns at Arlington National Cemetery, Va., June 14, 2010. SHARE IMAGE: Download Image: Full Size (0.07 MB) Photo By: VIRIN: 654650-C-KKJ49-780.jpg Photo Gallery