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Washington D.C., United States - May 24th, 2009: A group of bikers pass onlookers as they ride into Washington D.C. during the annual Rolling Thunder Memorial Day weekend observance.
The Rolling Thunder motorcycle rally began in 1987 as a demonstration to bring awareness to the plight of prisoners of war (POW) and to those missing in action (MIA).
Today over 250, 000 motorcycles ride during the Rolling Thunder Memorial Day weekend observance, held each year in Washington D.C.. Rolling Thunder has evolved to be not only a demonstration for the POW/MIA issue but also a demonstration of patriotism and respect for soldiers and veterans from all wars.