Government representatives of 60 countries have gathered in Warsaw for a summit the United States hopes can be used to increase foreign pressure on Iran.
The White House has brought it's A-Team: Vice President Mike Pence, Secretary of State Mike Pompeo, adviser Jared Kushner.
Israel's Benjamin Netanyahu is there, Arab leaders, and more.
But who isn't attending, and why it's being hosted in Poland, may say a lot about where these alliances are going.
(SOUNDBITE) (English) U.S. SECRETARY OF STATE, MIKE POMPEO, SAYING: "We're going to gather up to talk about the future of Middle East stability and prosperity" Germany and France didn't send their foreign ministers.
And the EU's foreign policy chief, who was a key player in the Iran nuclear deal, said she had prior committments.
They may be deliberate snubs.
The European Union right now is struggling to salvage what's left of the 2015 agreement, which lifted some sanctions on Iran in exchange for curbing its nuclear program.
The Trump administration pulled out but both the EU and Iran stayed in.
Western European allies are also angry with the U.S. decision to withdraw troops from Syria.
The Palestinians, some of whom are seen as proxies for Iran, didn't attend.
Likely because Kushner is there and is expected to talk about the American plan for peace been Israelis and Palestinians -- a vision the Palestinians are boycotting.
The location is also important.
Poland is a NATO member but doesn't play much of a direct role in countering Iran.
But Poland IS an EU member as well, along with another attendee: Hungary.
The two countries are finding themselves increasingly isolated within the EU over civil rights concerns and the rule of law.
In joining this summit, they may be hinting that they feel closer to Washington, than Brussels.