Spc. Corey Levi, 396th Medical Company, conducts preventive maintenance checks and services on a High Mobility Multipurpose Wheeled Vehicle, during an airborne operation, for the XIX Annual Randy Oler Memorial Operation Toy Drop, hosted by U.S. Army Civil Affairs & Psychological Operations Command (Airborne), at Luzon Drop Zone on Dec. 12, 2016. Operation Toy Drop is the world’s largest joint and combined airborne operation and collective training exercise with paratroopers from eight partner-nations. (U.S. Army photo by Spc. Lisa Velazco/Released)