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.

The NATO Chiefs of Defense reaffirmed support for Ukraine in a virtual meeting Wednesday in Brussels that included all 32 allied military leaders and featured the first briefing in this format led