Benjamin Shipp, 100th Civil Engineer Squadron Heating and Ventilation electrician from Cambridge, works on the limit controls of a burner March 5, 2013, at RAF Mildenhall, England. The burners produce 7 million British thermal units per hour and are measured by electricians in hours due to duty load and running time. The shop manages and maintains the heating and air conditioning for all of RAF Mildenhall. (U.S. Air Force photo by Gina Randall/Released)