U.S. Air Force Senior Airman Ruben Mejia, 1st Maintenance Squadron precision measurement equipment laboratory technician, checks the state of water with a temperature calibration system at Joint Base Langley-Eustis, Va., Nov. 3, 2016. Meteorology, parachutes, and jet engines all benefit from the temperature calibration system which provides a reference for what temperature equipment can be used in successfully. (U.S. Air Force photo by Airman 1st Class Kaylee Dubois)