Article Photos: Oklahoma football: After three strong quarters, Sooner defense faltered when it most mattered 51/95

Kansas State's Chris Harper (3) catches the ball beside Oklahoma's Aaron Colvin (14) during a college football game between the University of Oklahoma Sooners (OU) and the Kansas State University Wildcats (KSU) at Gaylord Family-Oklahoma Memorial Stadium, Saturday, September 22, 2012. Oklahoma lost 24-19. Photo by Bryan Terry, The Oklahoman