A C-5A auxiliary fuel tank sits in the Aircraft Fuel Systems Repair Facility Oct. 18, 2013, at Dover Air Force Base, Del. The fuel tank serves as a trainer for aircraft fuel system maintainers and first responders during annual confined space rescue training exercises. (U.S. Air Force photo/Roland Balik)
Tim Hahn, from the 436th Airlift Wing Ground Safety office, listens to Senior Airman Brandon Reeves, 436th Maintenance Squadron, prior to a confined-space rescue exercise Oct. 18, 2013, at Dover Air Force Base, Del. The exercise scenario was designed to test emergency actions taken by aircraft fuel systems repair personnel and response time by the 436th Civil Engineer Squadron Fire Department. (U.S. Air Force photo/Roland Balik)
Senior Airman Brandon Reeves, 436th Maintenance Squadron, takes a simulated air sample reading during a training exercise Oct. 18, 2013, at Dover Air Force Base, Del. Reeves used a photo ionization detector to check the fuel vapor level at the fuel tank access point. (U.S. Air Force photo/Roland Balik)
436th Maintenance Squadron Aircraft Fuel Systems Repair members Senior Airman Jason Morton, top, places Airman 1st Class Joshua Lamontagne on the ground during a confined-space rescue training exercise Oct. 18, 2013, at Dover Air Force Base, Del. Lamontagne had a simulated head injury and had to be rescued from inside a C-5A auxiliary fuel tank trainer. (U.S. Air Force photo/Roland Balik)
Simulated victim Airman 1st Class Joshua Lamontagne, center, 436th Maintenance Squadron, is lowered from the fuel tank access point Oct. 18, 2013, during a confined-space rescue training exercise at Dover Air Force Base, Del. Staff Sgt. Lemuel Robledo, left, and Senior Airman Jason Morton, right, both from the 436th MXS, removed Lamontagne and provided self-aid buddy care prior to the arrival of first responders. (U.S. Air Force photo/Roland Balik)
Simulated victim Airman 1st Class Joshua Lamontagne, is attended to by Staff Sgt. Lemuel Robledo, left, and Senior Airman Jason Morton, right, all from the 436th MXS, Oct. 18, 2013, at Dover Air Force Base, Del. Senior Airman Brandon Reeves, top, extracted Lamontagne from the C-5A fuel tank trainer during a confined-space rescue exercise. (U.S. Air Force photo/Roland Balik)
Senior Airman Jason Morton, left, 436th Maintenance Squadron, and Peter Bortz, right, 436th Civil Engineer Squadron Fire Department, provide care to simulated victim Airman 1st Class Joshua Lamontagne, 436th MXS, Oct. 18, 2013, at Dover Air Force Base, Del. Aircraft fuel systems repair facility personnel and Dover AFB first responders were evaluated during their annual confined-space rescue exercise. (U.S. Air Force photo/Roland Balik)
Michael Palatucci, left, and Peter Bortz, right, both from the 436th Civil Engineer Squadron Fire Department, provide care to simulated victim Airman 1st Class Joshua Lamontagne, 436th Maintenance Squadron, Oct. 18, 2013, at Dover Air Force Base, Del. Dover AFB first responders and 436th MXS Aircraft Fuel Systems Repair personnel were evaluated during their annual confined-space rescue exercise. (U.S. Air Force photo/Roland Balik)
First responders from the 436th Civil Engineer Squadron Fire Department, provide care to simulated victim Airman 1st Class Joshua Lamontagne, 436th Maintenance Squadron, Oct. 18, 2013, at Dover Air Force Base, Del. Lamontagne, an aircraft fuels system maintainer, played the part as a victim with a head injury during an annual confined-space rescue exercise. (U.S. Air Force photo/Roland Balik)
Michael Palatucci,from the 436th Civil Engineer Squadron Fire Department, supports the head of simulated victim Airman 1st Class Joshua Lamontagne, 436th Maintenance Squadron during a training exercise Oct. 18, 2013, at Dover Air Force Base, Del. Lamontagne was extracted from a C-5A fuel tank trainer during a confined-space rescue exercise. (U.S. Air Force photo/Roland Balik)
436th Maintenance Squadron's Aircraft Fuel Systems Repair Facility personnel use this full-face inline air supplied respirator during a confined-space rescue exercise Oct. 18, 2013, at Dover Air Force Base, Del. Personnel entering an aircraft fuel tank must don a respirator prior to entering the tank.(U.S. Air Force photo/Roland Balik