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

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 eight.Natalee Andrews, left, and Nathan Dyer looked at the floodwaters in Crooksville, Ohio, on Tuesday.

J Jacey Fortin

Indiana Prepares for More Rain After Days of Deadly Storms

Since last week, hazardous weather has caused seven deaths, forced people from their homes and required some to be rescued by boat. The region was at risk for more flooding on Sunday.Evacuation efforts in Indianapolis on Saturday.

B Bernard Mokam

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