Retired U.S. Army Gen. Barry McCaffery and Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, present a wreath at the annual Memorial Day Observance Ceremony at the Vietnam Veterans Memorial in Washington, D.C., May 31, 2010. Mullen gave the keynote address and recognized the addition of six new names to the over 58,000 service members who perished in that war. DoD photo by U.S. Navy Petty Officer 1st Class Chad J. McNeeley

Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, poses for photos with U.S. Marine and Vietnam veteran Sgt. Paul Masi at the annual Memorial Day Observance Ceremony at the Vietnam Veterans Memorial in Washington, D.C., May 31, 2010. Mullen gave the keynote address and recognized the addition of six new names to the over 58,000 service members who perished in that war. DoD photo by U.S. Navy Petty Officer 1st Class Chad J. McNeeley

Before leaving Arlington National Cemetery, Va., after speaking at the annual Memorial Day Observance, May 31, 2010, Vice President Joe Biden and his wife Jill stopped by Section 60 - where some of our nation's most recently fallen heroes lie - to talk with family members and offer personal condolences. DoD photo by R. D. Ward

Deputy Secretary of Defense William J. Lynn III delivers remarks at the annual Memorial Day observance at Arlington National Cemetery, Va., May 31, 2010. Lynn, who hosted the ceremonies, concluded by introducing Vice President Joe Biden, the featured speaker. DoD photo by R. D. Ward

Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, Deputy Secretary of Defense William J. Lynn III, and Vice President Joe Biden - the principals at the annual Memorial Day observance at Arlington National Cemetery, Va., - salute and join in the singing of the national anthem, May 31, 2010. DoD photo by R. D. Ward

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. DoD photo by R. D. Ward

Vice President Joe Biden places a wreath at the Tomb of the Unknowns at Arlington National Cemetery, Va., May 31, 2010. DoD photo by R. D. Ward

Vice President Joe Biden lays a wreath at the Tomb of the Unknowns at Arlington National Cemetery, Va., May 31, 2010. DoD photo by U.S. Navy Petty Officer 1st Class Chad J. McNeeley