These pictures are of the annual Razorback Powwow held at the University of Arkansas. This shows the Grand Entry, when dancers enter the sacred arena to signify the beginning of the event.
Many people participate.
Vendors sell everything from beadwork to drums at powwows. Most vendors have some family connection to a tribe. The headdresses of men are often very ornate and express their power. The American flag is also often displayed at powwow events. This native dancer will compete later in full dress.