2. A secret U.S. cyberattack in June wiped out a critical database that Iran used to target oil tankers, senior U.S. officials said.

The attack came the day President Trump authorized but called off a retaliatory airstrike after Iran shot down an American drone. The downside, the officials said: It cost the U.S. access to a critical network used by the Revolutionary Guards, Iran’s paramilitary force. Above, a Guard boat swept near a British-flagged ship this month.

And an administration official responded to reports that Mr. Trump has been telling aides to get his wall on the southern border built by whatever means necessary, including seizing land on the Mexican frontier.