Pentagon believes that North Korea's nuclear forces could threaten the United States

North Korea is expanding and improving its nuclear forces, threatening US security.

According to The Daily Baku, this is stated in the latest version of the National Defense Strategy published by the Pentagon.

"North Korea's nuclear forces are increasingly capable of threatening the United States. These forces are growing in size and sophistication, and there is a clear and present threat of a nuclear strike on American territory," the document states.