By Daisy Creager Staff Writer dcreager@oklahoman.comEmma Sitzman pushes her brown leather boot into the stirrup, the spur clinking. She pulls herself onto an elegant Arabian horse, Rico, removes red and black gloves from her pocket and secures a walkie-talkie to her belt. Her trainer, Cody Ralston, stands in the center of the performance arena at State Fair Park, the other walkie-talkie held to his mouth, and watches as Sitzman rides Rico along the tan and blue walls. “Walk slowly,” he says. “Pull your right hand back.Read more on NewsOK.com