The new US nuclear strategy — released this weekend — calls for developing a ground-launched, intermediate-range cruise missile to counter a similar Russian weapon, US officials said.

The deployment of these weapons violates the 1987 Intermediate-Range Nuclear Forces Treaty (INF Treaty) between Moscow and Washington, which calls for the elimination of their intermediate and shorter-range missiles.

The Trump administration’s first Nuclear Posture Review (NPR 2018) also confirms a Russian claim that it has made the world’s most powerful nuclear weapon called Kanyon.

Documents leaked in Moscow describe Kanyon as a nuclear-armed autonomous torpedo capable of travelling 10,000 kilometres with a 100-megaton thermonuclear weapon as its payload. That’s at least twice as powerful as any nuclear weapon ever tested. US officials say that Washington has been forced to develop its own missiles to counter the threat posed by this new Russian weapon.