Newsweek has looked at the potential fallout of the U.S. using the largest nuclear weapon in its arsenal, the B-83, on capitals in North Korea, Russia and China.

Within a decade, it is expected that China will have as many nuclear warheads deployed as the United States. Pentagon estimates suggest that Beijing will have 1,500 operable nuclear weapons by 2035.

Chinese and Russian militaries have organised and carried out the ninth joint strategic air patrol in "relevant airspace" over the Sea of Japan on Friday, Chinese state broadcaster CCTV said. The air patrol was part of an annual cooperation plan between the countries since 2019.