North Korea's leader, Kim Jong Un , watched on as the secretive nation tested two new types of air-defense missiles, state media reported on Sunday.

Why It Matters

North Korea has pushed ahead with its weapons development and military buildup while turning away from long-term efforts to secure peace on the divided peninsula with its southern neighbor.

Western officials and experts believe Russia offered a helping hand in its military programs, and Pyongyang is sharply critical of U.S. ties to South Korea and Japan—countries looking on with deep anxiety at the North's burgeoning nuclear weapons program, intercontinental ballistic missile tests and showcasing of hypersonic designs.

What To Know

North Korean missile experts test-fired two "improved" types of air-defense missiles at sev

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