From left, U.S. Air Force Airman Gabrielle Victor and Airman 1st Class Ryan Mundt, 633rd Civil Engineer Squadron engineering technicians, prepare for an optical site survey, at Joint Base Langley-Eustis, Va., March 9, 2017. Victor and Mundt are members of the mapping section, which fulfills requests, such as finding appropriate locations for projects and estimating the resources needed for them. (U.S. Air Force photo/Senior Airman Areca T. Bell)