Arlington Cemetery (25 images)

The Marines Honor Guard stand guard at the Tomb of the Unknown Soldier during the wreath ceremony on Veteran's Day in Arlington, Virginia on November 11, 2006. (UPI Photo/Alexis C. Glenn)

Members of the Marine and Air Force Honor Guard participate in a Veterans Day wreath laying ceremony at the Tomb of the Unknown Soldier at Arlington National Cemetary in Arlington, Virginia on November 11, 2007. (UPI Photo/Kevin Dietsch)

Vice President Dick Cheney speaks at a Veterans Day ceremony, at Arlington National Cemetery in Washington on November 11, 2005. (UPI Photo/Kevin Dietsch)

USAF Maj. Thomas L. Cowan (RET) and his sons Thomas L. Cowan II, 8, and Ernest D. Cowan, 2, pay tribute to soldiers who died in Iraq and Afghanistan at Arlington National Cemetery on in Arlington, Virginia, on Memorial Day, May 28, 2007. (UPI Photo/Roger L. Wollenberg)