New details revealed by The Times show that the failures on Jan. 29 before an Army helicopter crashed into a jet near Reagan National Airport were far more complex than previously known.

Judge Hannah Dugan is accused of obstructing justice after directing a migrant out of her courtroom as federal agents waited to arrest him. Her arrest has raised several questions.

A man was arrested after a vehicle drove into a Filipino community festival on Saturday in British Columbia, in a “mass casualty incident,” the police said.