These photos were taken at a Pow Wow or Wacipi in the Lakota Language (meaning they dance). This is a ceremonial gathering of many people and tribes to share dance, song, and celebrate life. This gentleman's dance regalia consisted of buffalo robes which must have been hot. The temperature was near 90°F, and the sun was searingly hot. He must be a tough man.
There are dances for men and women, and others. This is a fancy shawl dancer doing her dance in mid air.