Langley 1 of 4 bases to test bio-based grease
Senior Airman Evin Diaz, a 733rd Logistics Readiness Squadron vehicle maintainer, replaces a vehicle’s wheel bearing after it is coated with bio-based grease at Joint Base Langley-Eustis, Va., Jan. 31, 2017. A 12-month long experiment will be performed on vehicles across the installation, to observe the impact that the bio-based grease has on vehicle life and maintenance longevity. (U.S. Air Force photo/Airman 1st Class Kaylee Dubois)