The U.S. Military Wants A.I. Dominance. Feuds and China May Thwart It.

The administration is veering wildly in its response to the national security implications of A.I. as China, America’s main technological and military rival, charges ahead.Recent A.I. advances have roiled the Pentagon and the national security establishment.

D David E. Sanger, Dustin Volz, Ana Swanson and Julian E. Barnes

Years of Trump Support Came Undone in 15 Minutes in an Airport.

The case represents a new front in President Trump’s mass deportation drive: arrests at airports of people who have active immigration cases and no criminal history.Galina Bobreneva and her husband, Brent Jindra, at their home in Redwood City, Calif.

M Miriam Jordan

How The New York Times Reported on Trump’s Air Force One Ruse in Turkey

President Trump’s Air Force One subterfuge duped potential adversaries — and the press. Here’s what happened.President Donald Trump walked off Air Force One in Britain, but as was recently revealed he had not flown on the plane.

M Megan DiTrolio, Peter Baker, Doug Mills and Richard W. Stevenson

Is the Democratic Party Facing Its Own Tea Party Moment?

A string of primary wins by progressive candidates has revealed the strength of a high-energy insurgent movement but also its potential limitations.Bernie Sanders and Zohran Mamdani at a rally last week.

L Lisa Lerer and Katie Glueck

What We Know About the Storms Battering the Midwest

A lingering weather system has brought severe flooding and intense winds — including a few tornadoes — to Illinois, Indiana and Ohio, killing at least seven.Natalee Andrews, left, and Nathan Dyer looked at the floodwaters in Crooksville, Ohio, on Tuesday.

J Jacey Fortin

As the Old Files Open, One Family Confronts Another’s Dark Nazi Past

A woman who secured the criminal file of her grandmother, a collaborator, offered to share it with a Jewish family that had been betrayed. Then she balked and a new dispute ensued.Maria-Elisabeth Stratermans-Coenegrachts was arrested after the war and accused of having served as a collaborator.

N Nina Siegal and Melissa Schriek