WASHINGTON (AP) — The roar of motorcycle engines is filling the air in the nation's capital.

Organizers say hundreds of thousands of bikers and spectators gather every Memorial Day weekend for the Rolling Thunder "Ride for Freedom." The event got its start in 1988 and it honors military veterans and members of the military missing in action.

Bikers rally at the Pentagon all morning Sunday, then cross the Memorial Bridge at noon and cruise around the National Mall.

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