North Korea's leader Kim Jong Un looks at military weapons and vehicles on display at the Defence Development Exhibition, in Pyongyang, North Korea, October 12, 2021. The Defence Development Exhibition "Self-Defence-2021" was opened with splendor at the Three-Revolution Exhibition House on October 11 on the occasion of the 76th founding anniversary of the WPK. KCNA via REUTERS

North Korea's leader Kim Jong Un looks at military weapons and vehicles on display at the Defence Development Exhibition, in Pyongyang, North Korea, October 12, 2021. Present there on invitation were merited officials, scientists and technicians in the national defence industrial field. KCNA via REUTERS

North Korea's leader Kim Jong Un speaks to officials next to military weapons and vehicles on display, including the country's intercontinental ballistic missiles (ICBMs), at the Defence Development Exhibition, in Pyongyang, North Korea, October 12, 2021. The soldiers who cultivated annihilating fighting spirit and bravery true to the Party's training-first policy creditably performed combat actions and method to be applauded by the participants. KCNA via REUTERS

North Korea's leader Kim Jong Un presents awards to military service personnel at the Defence Development Exhibition, in Pyongyang, North Korea, October 12, 2021. KCNA via REUTERS

North Korea's leader Kim Jong Un attends the Defence Development Exhibition, in Pyongyang, North Korea, October 12, 2021. KCNA via REUTERS

North Korea's leader Kim Jong Un watches planes during a flypast at the Defence Development Exhibition, in Pyongyang, North Korea, October 12, 2021. KCNA via REUTERS