Bret Taylor, the chairman of OpenAI’s board, said the artificial intelligence company was “not for sale.” Mr. Musk is separately raising money for his A.I. start-up, xAI. By Cade MetzMike ...

Tobias Schwarz/Agence France-Presse — Getty Images At the Munich Security Conference ... that Russia had carried out the strike. By Kim BarkerAndrew E. Kramer and Qasim Nauman Vice President ...

The UN’s International Atomic Energy Agency did ... Britain announces further sanctions on people with links to Vladimir Putin’s inner circle. The foreign secretary will have talks with ...