North Korea displayed its new military drones, an underwater attack drone and its largest nuclear missiles at a military parade in Pyongyang on Thursday night, according to state media, where the country’s army chief warned the U.S. that nuclear war is approaching.

DPRK leader Kim Jong Un attended the event but did not give a speech, the Rodong Sinmun reported, while visiting Russian defense chief Sergei Shoigu and Chinese politburo member Li Hongzhong joined Kim on the VIP viewing stands overlooking Kim Il Sung Square.