President Bush will pay tribute at a Memorial Day ceremony later Monday at Arlington National Cemetery to members of America's military who died in combat.
Mr. Bush will make remarks and lay a wreath at the Tomb of the Unknowns which contains the remains of unidentified U.S. service members who died in World Wars I and II - and in the Korean War.
On Sunday thousands of motorcycle riders conducted a parade through downtown Washington to honor missing soldiers and prisoners of war.
In the United States, the Memorial Day holiday marks the unofficial start of summer, and is an occassion for picnics and parties as well as for observances at military cemeteries around the country.
Some information for this report was provided by AP and Reuters.