Sailors give the signal to launch an F/A-18F Super Hornet from the "Diamondbacks" of Strike Fighter Squadron 102 from the flight of the Nimitz-class aircraft carrier USS George Washington as part of Keen Sword 2015. KS15, a joint/bi-lateral field training exercise involving U.S. military and Japan Self-Defense Force, is designed to increase combat readiness and interoperability of U.S. forces and JSDF.