U.S. Air Force Airman 1st Class Justin West, 733rd Logistics Readiness Squadron vehicle maintainer, coats the fifth wheel of a tractor trailer with a bio-based grease at Joint Base Langley-Eustis, Va., Jan. 31, 2017. JBLE has partnered with the Defense Logistics Agency to host a 12-month long experiment that will perform a test of the bio-based grease on three vehicles from different mission assets across the installation. (U.S. Air Force photo by Airman 1st Class Kaylee Dubois)