Motorcycle riders drive through the National Mall in Washington for the annual Rolling Thunder Memorial Day weekend observance
More than 250,000 motorcycle riders drove through the National Mall in Washington for the annual Rolling Thunder Memorial Day weekend observance held each year. Rolling Thunder has evolved to be not only a memorial for the prisoners of war and missing in action, but also a demonstration of patriotism and respect for current service members and veterans from all wars. Original public domain image from Flickr