The stakes have never been higher in the Ukraine-Russia war. In the week that saw the conflict pass its 1000th day, Western powers substantially boosted Ukraine's military arsenal - and the Kremlin made its loudest threats yet of a nuclear strike.

He declared that a conventional attack by any nation supported by a nuclear power will be considered a joint attack on Russia.

On Tuesday, Ukraine for the first time fired U.S. ballistic missiles into Russia, striking a munitions depot supporting the invasion of the smaller nation.