14 JULY 2012 - OAK SPRINGS, AZ: A cowboy's chaps on a fence during a bull riding class. The bull riding class was offered by the Crooked Horn Cattle Co. in the community of Oak Springs on the Navajo Nation, about 15 miles south of Window Rock, AZ. Eleven cowboys signed up for bull riding classes and one signed up for bull fighting classes. The bull riding class started with lessons on a mechanical bucking machine before the cowboys rode bulls. PHOTO BY JACK KURTZ