SAND MAN Sand falls from the helmet of U.S. Air Force Airman 1st Class Bryan Rozier as he gets up after low crawling 25 feet through a sandpit during the Defender Challenge course on an air base in Southwest Asia, April 25, 2009. Rozier is assigned to the 380th Expeditionary Civil Engineer Squadron. The course tests stamina, strength and brain power. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 711987-T-WTR44-576.jpg Photo Gallery