Tensions rise as Moscow lowers nuclear strike threshold and Ukraine uses US-made missiles to strike Russia.
A special hotline in place to deflate crises between the Kremlin and the White House is not currently being used, the Kremlin said on Wednesday, as nuclear risks rise amid the highest tensions between Russia and West in decades.
Russian President Vladimir Putin on Tuesday lowered the threshold for a nuclear strike in response to a broader range of conventional attacks, days after reports said Washington had allowed Ukraine to use US-made weapons to strike deep into Russia.
