LONDON U.K. Prime Minister Keir Starmer and French President Emmanuel Macron sealed deals on defense cooperation, including a pledge to coordinate their nuclear deterrents for the first time. The announcement came after Macron concluded a three-day state visit to Britain. “Now as Europe’s only nuclear powers and as leaders in NATO, we play a vital role in preserving the peace and security on this continent,” Starmer said. “From today, our adversaries will know that any extreme threat to this