Pyongyang’s deputy UN ambassador warned on Monday that tensions on the peninsula have escalated so high that “a nuclear war may break out any moment.”

The USS Michigan, a stealthy submarine laden with more than 100 Tomahawk cruise missiles just arrived in South Korea’s Busan port. It likely carried Navy SEAL and covert submarines designed for operations deep behind enemy lines.

However, North Korean artillery, before getting obliterated by US and South Korean air power, could kill off as many as 20,000 in South Korea’s capital of Seoul each day. This all but precludes a US preemptive strike.

North Korea as much as admitted it doesn’t have a credible way of striking the US on Monday, with an official telling CNN it needs to conduct more tests. Striking South Korea or Japan would also result in a smoldering Pyongyang.

“The last person who wants conflict on the is Kim Jong Un,” said Yong Suk Lee, the deputy assistant director of the CIA’s newly created Korea Mission Center previously said. Kim Jong Un has “no interest in going toe-to-toe” with the US, continued Lee.

Kim Jong Un has found that the best way to protest US military strength that they can’t possibly defeat sitting near its borders is to float the idea that nuclear war may be just a moment away, but that’s the last thing it wants.