FOAM FORCE Air Force Staff Sgt. John Sherman finds himself in a snowstorm of fire retardant foam unintentionally released in an aircraft hangar on Travis Air Force Base, Calif., Sept. 24, 2013. Sherman is assigned to the 60th Engineer Squadron fire fighter. The nonhazardous foam is similar to dish soap, which dissolves into a liquid. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 319591-T-XFJ40-836.jpg Photo Gallery