Article Photos: Second-half performance can be building block for Cowboy defense 55/62

Texas Tech's Edward Britton (27) fumbles the ball after getting hit by Oklahoma State's Kellen Tillman (56) during the second half of the college football game between the Oklahoma State University Cowboys (OSU) and the Texas Tech University Red Raiders (TTU) at Boone Pickens Stadium in Stilllwater, Okla., on Saturday, Sept. 22, 2007. OSU won, 49-45. By NATE BILLINGS, The Oklahoman