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Retired Master Sgt. Rob Wilkins, front, and retired Marine 1st Sgt. Walt Sides pose for a portrait May 15, 2014, at Sides' farm outside Leesburg,Va. Wilkins and Sides are directors of Rolling Thunder, the annual motorcycle demonstration run through Washington, D.C., which attempts to raise awareness of military veterans, prisoners of war and missing in action personnel. (U.S. Air Force photo/Senior Airman Alexander W. Riedel)