On Tuesday, U.K. Prime Minister Keir Starmer hailed the possibility of NATO-backed security guarantees as a “breakthrough,” noting that the U.S. was now working “at pace” with 30 or so other countries, which he called a “coalition of the willing,” to help Ukraine.

NATO defense chiefs have discussed potential security guarantees for Ukraine to help end Russia’s three-year war

Meetings between NATO and U.S. defense officials left allies concerned that President Donald Trump would leave Europe to ensure a lasting peace in the war-scarred country.