Rolling Thunder 2013

Motorcyclists ride across into Washington, Sunday, May 26, 2013, during the annual Rolling Thunder "Ride for Freedom" parade ahead of Monday's Memorial Day celebration.

Marine veteran, retired Staff Sargent Tim Chambers, salutes as motorcyclists, many of whom are veterans, cross the Memorial Bridge into Washington during the annual Rolling Thunder "Ride for Freedom" parade Sunday, May 26, 2013, the ahead of Monday's Memorial Day celebration. (AP Photo/Molly Riley)

Marine veteran, retired Staff Sargent Tim Chambers, salutes as motorcyclists, many of whom are veterans, cross the Memorial Bridge into Washington during the annual Rolling Thunder "Ride for Freedom" parade Sunday, May 26, 2013, the ahead of Monday's Memorial Day celebration. (AP Photo/Molly Riley)

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