Tech. Sgt. Travis Powers, fuel specialist assigned to the 134th Air Refueling Wing, Tennessee Air National Guard, measures and adds the fuel additive into the fuel additive injection cart, June 9, 2019, during exercise Saber Guardian 19 at Burgas Airport, Bulgaria. The USEUCOM, NATO exercise promotes regional stability and security while increasing readiness, strengthening partner capabilities and fostering trust. While training with regional allies and partners, the U.S. presence will continue to galvanize our commitment to security throughout the Black Sea and Balkan regions. (U.S. Air National Guard photo by Tech. Sgt. Daniel Gagnon)