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.

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.

One question is whether the new administration and Europe will provide security guarantees to prevent Russia from taking more territory.