On Friday, January 20, 2017, The United States, South Korea, and Japan began a three-day naval-missile defense exercise in response to concerns of a possible North Korean ICBM test during President Trump’s inauguration. The exercises were conducted as a combined effort between the USS Stethem (DDG 63), the JDS Kirishima (DDG-174), and the ROKS Sejong the Great (DDG-991). Although no interceptors were launched, the exercise included missile detection and tracking drills in the Sea of Japan, where Aegis-equipped ships faced simulated targets. This exercise was the third of its kind, following similar drills in June and November 2016.