Article Photos: OKC THUNDER: Closing the door has been the key 15/21

Dallas' Dirk Nowitzki (41) reacts after a basket during the NBA basketball game between the Oklahoma City Thunder and the Dallas Mavericks at Chesapeake Energy Arena in Oklahoma City, Monday, March 5, 2012.  In the background is Oklahoma City's Nick Collison (4). The Thunder won, 95-91. Photo by Nate Billings, The Oklahoman