Army Secretary John M. McHugh, Army Vice Chief of Staff Gen. Lloyd Austin and Army Lt. Gen. William Troy, left, Army staff director, present a wreath in honor of the Army's 237th birthday at the Tomb of the Unknowns in Arlington National Cemetery in Arlington, Va., June 14, 2012. Army Secretary John M. McHugh, Army Vice Chief of Staff Gen. Lloyd Austin and Army Lt. Gen. William Troy, left, Army staff director, present a wreath in honor of the Army's 237th birthday at the Tomb of the Unknowns in Arlington National Cemetery in Arlington, Va., June 14, 2012. SHARE: Download: Full Size (2.19 MB) Tags: Photo Essays Credit: VIRIN: 775172-W-GXN23-263.jpg Photo Gallery