Rolling Thunder motorcycle rally (7 images)

Bikers salute USMC SSgt. Tim Chambers who stands in the middle of the street as motorcycles roar past during the Rolling Thunder Motorcycle Rally XXIV, on Memorial Day weekend, May 29, 2011, in Washington,D.C. Hundreds of thousands of bikers annually converge on Washington for the rally to remember America's military veterans, POWs and MIAs. UPI/Mike Theiler

during the Rolling Thunder Motorcycle Rally, May 29, 2011, in Washington,D.C. Hundreds of thousands of bikers annually converge on Washington for the rally to remember America's military veterans, POWs and MIAs. UPI/Mike Theiler

A biker (R) and a tourist pause at the Vietnam War Memorial during the Rolling Thunder Motorcycle Rally XXIV, on Memorial Day weekend, May 29, 2011, in Washington,D.C. Hundreds of thousands of bikers annually converge on Washington for the rally to remember America's military veterans, POWs and MIAs. UPI/Mike Theiler

Bikers from Pittsburgh, PA, join tourists as they listen to an honor guard at the Vietnam War Memorial, during the Rolling Thunder Motorcycle Rally XXIV, on Memorial Day weekend, May 29, 2011, in Washington,D.C. Hundreds of thousands of bikers annually converge on Washington for the rally to remember America's military veterans, POWs and MIAs. UPI/Mike Theiler