Under a new partnership, the Defense Department would play a larger role in biodefense and pandemic preparedness. Democrats warned it could allow a Pentagon cash grab.

The administration will work with a private Venezuelan oil company that has close ties to the country’s government.

© Adriana Loureiro Fernandez for The New York Times

Since April, the Defense Department has halted all military reviews for wind projects, stalling dozens of projects nationwide.

Since April, the Defense Department has halted all military reviews for wind projects, stalling dozens of projects nationwide.

© Nick Oxford/Reuters

A new policy raises questions about testosterone’s effect on aggression in some men.

Hundreds of bases are contaminated with PFAS, which are linked to low birth weight and other risks. Politicians from both parties are demanding explanations.

© Nina Riggio for The New York Times

Hundreds of bases are contaminated with PFAS, which are linked to low birth weight and other risks. Politicians from both parties are demanding explanations.

Workers at the artificial intelligence company have been puzzled and increasingly concerned by the administration’s move to limit their latest A.I. models.

The administration’s surprise restrictions Friday cut off foreign access to Anthropic’s latest models and sparked another round of finger pointing.

More than 100 planned wind farms in 21 states are now stalled indefinitely as the Pentagon delays military reviews once seen as routine.

More than 100 planned wind farms in 21 states are now stalled indefinitely as the Pentagon delays military reviews once seen as routine.

© Brandon Thibodeaux for The New York Times

The Netherlands blocked a U.S. company from buying a Dutch firm that handles its national ID system, saying it would create a “threat to the public interest.”

The claim that their loved ones’ deaths and disappearances are linked is almost certainly false — but the loss remains real.