Ziggy Williams of the Navajo Nation dances during the Grand Entry of the Denver March Powwow in Denver, Colorado.  Held over four days, the Denver March Powwow attracts an estimated 55,000 participants, made up of dancers, drummers, vendors, and spectators. Since 2009 roughly 95 nations, 35 US states, and five Canadian provinces have been represented during the powwow. — AFP