Special U.S. envoy Steve Witkoff says Russian leader Vladimir Putin agreed to allow the U.S. and Europe to offer Ukraine a security guarantee resembling NATO's collective defense mandate.

Zelensky returns to the Oval Office for the first time since his blowup with Trump. This time he is bringing back up.

A dramatic day unfolds in Washington as UK Prime Minister Keir Starmer, European Commission President Ursula von der Leyen, and NATO’s new Secretary General Mark Rutte arrive at the White House ahead of a joint meeting with Donald Trump.

The head of Canada's military spoke with other top soldiers across the NATO alliance Wednesday, as they seek options for upholding peace in Ukraine if a ceasefire comes into force.

The protections that the US and Europe would be able to provide to Ukraine are similar to NATO's collective defense mandate.

The Kremlin’s goal is to destabilize Europe, and attacks on infrastructure are a preferred weapon, a new report said.

The proposal for security guarantees for Ukraine appears to be triggering unease in Moscow, which repeated objections to any role for forces from NATO countries.

Russia is turning the parts of Ukraine it occupies into a giant military base — and a potential launch pad for future aggression. Moscow's forces in the occupied territories, particularly in the eastern Donetsk and Luhansk oblasts,