A U.S. Air Force F-15C Eagle fighter jet, flown by

A U.S. Air Force F-15C Eagle fighter jet, flown by U.S. Air Force Lt. Col. Christopher Ridlon, commander of the 194th Fighter Squadron, California Air National Guard, lands for the first time ever on Ukrainian soil to participate in CLEAR SKY 2018, Oct. 6. The exercise promotes regional stability and security, while strengthening partner capabilities and fostering trust. The training at CLEAR SKY greatly improves interoperability among participating countries. The F-15C landed at Starokostiantyniv Air Base where the majority of the multinational exercise involving approximately 950 personnel from nine nations will take place. (U.S. Air National Guard photo by Tech. Sgt. Charles Vaughn)