West Virginia Air National Guard firefighters, 167th Airlift Wing, Shepherd Field, W. Va., prepare to enter a VWANG C-130 Hercules during a simulated aircraft fire as part of Readiness Safeguard Ability To Survive and Operate (ATSO) training exercise at the Combat Readiness Training Center, Volk Field, Wis. The firefighters are Mission Oriented Protective Posture 4 in their joint Firefighter Integrated Response Ensemble gear. (U.S. Air Force photo by SENIOR MASTER SGT. Jeff Rohloff) (Released)