It promises to be a day unlike any other at the White House later, when world leaders make a rare collective visit for crunch talks on Ukraine.
What had been billed as a meeting between two presidents, Donald Trump and Volodomyr Zelensky, has now become more of a summit.
Leaders from the UK, France, Germany, Italy, Finland, the EU and Nato have dashed across the Atlantic to have their say on how the three-year-old war with Russia should end and on what terms.
It's a reflection of how high the stakes are and increased European concerns that the US has shifted its position to one less favourable to Ukraine.
We break down what each of those present - and one who is not - would regard as a win when the sun sets on a long day of talks.
US - a deal, any deal
Trump's campaign promise was that he would solve this conflict on his first day in office but six months later the breakthrough he wants still eludes him.
The terms of any agreement have seemed less important to Trump than the deal itself, so the conditions have shifted over time.
Since meeting Russian President Vladimir Putin in Alaska on Friday, Trump appears to have ditched his criticism of Moscow and the threat of sanctions, and decided to pile the pressure on Zelensky instead.
On Sunday night he warned the Ukrainian president he must forgo hopes of Nato membership and will have to concede Crimea, which Putin illegally annexed in 2014.
Trump's envoy Steve Witkoff said that Washington would provide security guarantees to Europe aimed at deterring further Russian aggression. But the details remain unclear.
Up to now, the US has resisted European demands that it commits to the future security of Ukraine. All eyes will be on the White House later to see if that has really changed.
Ukraine - avoid giving up territory
Zelensky finds himself in the unenviable position of having to stand his ground in the face of an increasingly impatient Donald Trump, who appears to have been swayed by Putin and who has already accused Zelensky of standing in the way of peace.
Trump will probably tell Zelensky he must agree to give up land. This will be extraordinarily difficult for the Ukrainian president to give in to as it would entail retreating from Donetsk and Luhansk, regions which thousands of Ukrainian soldiers have fought and died to protect since 2022.
It would also allow Russia to end up in control of huge swathes of territory it could later use as a launchpad for further aggression.
So Zelensky cannot agree to land concessions without strong security guarantees that would kick in should Russia attack again. Those could have been provided by Nato, but Trump has made it clear Ukraine will not join the alliance.
Details of any alternative guarantees have likely not been worked out yet, but without them it will be difficult for Zelensky to make any commitments.
Ukraine is also concerned by the fact that Trump seems to have moved on from wanting a ceasefire to pushing for a full peace deal. This could take an exceptionally long time, allowing in the meantime for continued Russian attacks, civilian deaths and frontline losses.
