U.S. Air Force Airman 1st Class Ryan Mundt, 633rd Civil Engineer Squadron engineering technician, prepares for an optical site survey, at Joint Base Langley-Eustis, Va., March 9, 2017. Mundt is a member of the mapping section, which keeps track of the location of a variety of items on base, including hunting stands, electrical and telephone lines, abandoned lines, water, sewage and stop signs on JBLE. (U.S. Air Force photo/Senior Airman Areca T. Bell)