 On April 28, 2017, North Korea launched an unidentified ballistic missile over Pukchang airfield, in North Korean territory.It blew up shortly after take-off at an altitude of approximately 70 km (44 mi).On July 4, 2017, North Korea launched Hwasong-14 from Banghyon airfield, near Kusong, in a lofted trajectory it claims lasted 39 minutes for 930 km (578 mi), landing in the waters of the Japanese exclusive economic zone.