Arlington Memorial Bridge

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Tires and other debris floats in the Potomac River near Memorial Bridge, Washington, D.C., Tuesday, November 19, 2013. (Andrew Harnik/The Washington Times)

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Motorcyclists ride across Memorial Bridge into Washington during the Rolling Thunder "Ride for Freedom" parade Sunday. (Associated Press)

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Flags and salutes were the order of the day Sunday as miles of motorcycles crossed Memorial Bridge en route to the Mall in the 26th annual Rolling Thunder Ride for Freedom. (Associated Press)

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Motorcycles drive over the Memorial Bridge during the annual Rolling Thunder "Ride for Freedom" parade ahead of Memorial Day in Washington, Sunday, May 26, 2013. (AP Photo/Molly Riley)

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Motorcyclists ride across Memorial Bridge into Washington during the annual Rolling Thunder "Ride for Freedom" parade ahead of Memorial Day Sunday, May 26, 2013. (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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Motorcyclists ride across the Memorial Bridge into Washington Sunday, May 26, 2013, during the annual Rolling Thunder "Ride for Freedom" parade ahead of Monday's Memorial Day celebration. (AP Photo/Molly Riley)

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Motorcycles drive over the Memorial Bridge during the annual Rolling Thunder "Ride for Freedom" parade ahead of Memorial Day in Washington, Sunday, May 26, 2013. (AP Photo/Molly Riley)

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A trip across Arlington Memorial Bridge is part of the course for Ride for Freedom participants, whose mission in part is to bring awareness to the public about the POW/MIA issue. ** FILE **

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Mike Evangelho, of Brick, N.J. makes his way across the Memorial Bridge during the annual Rolling Thunder event. (Barbara L. Salisbury/The Washington Times)

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Bikers make their way across the Memorial bridge from Virgnia into Washington during the 18th annual Rolling Thunder ride on May 29, 2005. The message on the clipboard reads: “Love never loses its way home.” Seven years later and now marking its silver anniversary, Rolling Thunder is bigger than ever. (The Washington Times)

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During Rolling Thunder, Rose Harrelson, left, greets bikers as they come across the Memorial Bridge. Sunday, May 26, 2002 ( Damiel Rosenbaum / The Washington Times )

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** FILE ** Bikers in the Rolling Thunder motorcycle rally ride across Memorial Bridge in Washington, D.C. In Michigan, the repeal of the helmet law is gaining traction. (Drew Angerer/The Washington Times)

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A crowd gathered at the Lincoln Memorial watches the bikers of the Rolling Thunder motorcycle rally ride across Memorial Bridge on Sunday. "I always come here," Iraq veteran Staff Sgt. Scot Dellmore said. "You can't beat D.C. You can't beat the crowd of bikes."