North Korea's Kim Yo Jong, the powerful sister of leader Kim Jong Un, said military drills by the United States, Japan and South Korea justify North Korea's nuclear reinforcement, state media KCNA said on Tuesday.

The United States flew a long-range bomber in a trilateral drill with South Korea and Japan on Sunday in response to North Korea's recent test-firing of a new intercontinental ballistic missile that is designed to strike the U.S. mainland, the South's ...