U.S. says China's nuclear weapons buildup "of great concern" after missile test

China's recent test-launch of a long-range ballistic missile from a nuclear-powered submarine in the South Pacific has sparked alarm among U.S. officials and neighboring countries, who view the move as part of a concerning buildup of nuclear capabilities. This demonstration of advanced submarine-launched ballistic missile technology underlines China's growing military ambitions and has raised questions about regional security dynamics. The U.S. has expressed "great concern" about this development, signaling a potential shift in global power balances and emphasizing the need for increased vigilance in international military strategies.