China said it test-launched an intercontinental ballistic missile on Wednesday, firing it into the Pacific Ocean in a rare trial run that flexed its military might. Beijing has stepped up its nuclear development in recent years, with the Pentagon last October warning China was developing its arsenal more quickly than the United States had anticipated. China held more than 500 operational nuclear warheads as of May 2023 and is likely to have more than 1,000 by 2030, it said.