David Demay, construction site manager, watches foam rain down in a hangar during a fire suppression safety test, May 3, 2016, at McConnell Air Force Base, Kan. The new hangars will house the KC-46’s, which are scheduled to arrive here in Spring 2017. The foam is dispensed from generators in the top of the hangar which expand and suffocate fire. (U.S. Air Force photo/Airman 1st Class Jenna K. Caldwell)