The [Vilnius] summit was evidence of the extraordinary level of unity and cohesion Mr Biden has managed to build among NATO partners and allies since Mr Putin launched his invasion. Few would have expected that after the divisions within the alliance caused by former president Donald Trump’s constant abuse of NATO members and his declared friendship with, and admiration for, Mr Putin. Mr Biden has done well to lead the fightback against Mr Putin’s villainy. US military support for Ukraine is running at a staggering $US83bn. The unity of purpose achieved at the NATO summit should leave Mr Putin in no doubt about how hopelessly deluded he was when he launched his invasion with the expectation it would be over in a few days with Russia’s capture of Kyiv.