When and why did the US halt military aid to Ukraine?published at 11:02 Greenwich Mean Time 5 March
Late on Monday - in the early hours of Tuesday morning in Ukraine - the White House announced the US was suspending military aid to Ukraine.
A White House official told the BBC's US partner, CBS News, that its reason for doing so was to "ensure that it is contributing to a solution".
In response, European Commission chief Ursula von der Leyen said Europe was ready to "step up" on defence, while Moscow welcomed the decision - saying it "could really push the Kyiv regime to a peace process".
Later, Vice-President JD Vance said the US needed to "get some payback for the incredible financial investment" it has made in Ukraine.
Asked if the aid might resume, he said when Kyiv begins negotiating "everything is on the table".
He also said that to move forward, they need Ukraine to come and tell them what they need privately: "That is the most important thing, and that lack of private engagement is what is most concerning to us."