Article Photos: OKC Thunder: Western Conference race tightens up 5/18

San Antonio's Tim Duncan (21) grabs a rebound next to Oklahoma City's Serge Ibaka (9) during the NBA basketball game between the Oklahoma City Thunder and the San Antonio Spurs at Chesapeake Energy Arena in Oklahoma City, Friday, March 16, 2012. Photo by Nate Billings, The Oklahoman