It began with a peace move nobody wanted and ended with an experimental missile strike so rare in war Moscow gave a 30-minute heads-up to Washington.

The Kremlin says that the firing of a hypersonic missile and an address by Vladimir Putin are clear messages to the West - describing the move to let Ukraine use their weapons to strike Russia as "reckless".

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.