U.S. Air Force Tech. Sgt. Daniel Roman, 49th Operations Support Squadron survival, evasion, resistance and escape specialist, instructs students on how to make a smoke signal to attract rescue forces in Orogrande, N.M., March 13. By laying certain kinds of dense, living brush onto an open flame, a thick trail of smoke can be created as a signaling device over large distances. As a SERE specialist at Holloman Air Force Base, N.M., Roman is charged with teaching aircrew members many essential lessons about survival. (U.S. Air Force photo by Airman 1st Class Daniel E. Liddicoet/Released)