Bill Harris, center, after being captured in 1975, the year after the S.L.A. kidnapped Patty Hearst. Her family, he later said, “was in control of a media empire that we viewed as an arm of propaganda for the United States government.”

Six members of the S.L.A. died in a shootout with Los Angeles police in May 1974. Clockwise from top left, Camilla Hall, William Wolfe, Donald DeFreeze, Patricia Soltysik, Nancy Ling Perry and Angela Atwood.

At the time of his arrest, David J. Rush was at work on highly classified programs for both the C.I.A. and the Pentagon.

Police officers and student protesters facing off outside a school in Paris on Thursday.

An ad that was approved by President Trump and paid for by U.S. Customs and Border Protection.

A water treatment plant in Georgia earlier this year. Officials have long warned that the nation’s roughly 150,000 water treatment systems are relatively easy targets for hackers.

Todd Blanche speaking at the Capitol last month.

A memorial near the driveway to Nancy Guthrie’s residence in February in Tucson, Ariz.

President Donald Trump points to attendees after delivering an address to the nation from the East Room on Thursday night.

A health worker measures the temperature of a motorcyclist passing through a checkpoint in Goma, North Kivu, Democratic Republic of the Congo, on Thursday.