Biden Aides Warned Putin as Russia’s Shadow War Threatened Air Disaster

The White House scrambled to get a message to President Vladimir V. Putin of Russia last year after U.S. intelligence agencies said a Russian military unit was preparing to send explosive packages on cargo planes.

Biden Administration Adopts Rules to Guide A.I.’s Global Spread

New rules aim to keep advanced technology out of China and to ensure that cutting-edge artificial intelligence is developed by the United States and its allies.

Biden Officials Say the Truth About Havana Syndrome Is Still Unknown

The White House contradicts a new intelligence assessment on the mysterious ailments that diplomats and spies have reported for years.

4 Takeaways From the Arguments Before the Supreme Court in the TikTok Case

The justices, who asked tough questions of both sides, showed skepticism toward arguments by lawyers for TikTok and its users.