Airman 1st Class Manolo Hernandez, 56th Civil Engineer Squadron water and fuels system maintenance technician, removes debris from a pipe while replacing an isolation valve, Nov. 2, 2020, at Luke Air Force Base, Arizona. Nicknamed the “Dirt Boyz,” these combat ready engineers sustain base infrastructure, facilities and real property assets through routine maintenance. (U.S. Air Force photo by Airman 1st Class Brooke Moeder)