The Trump administration tells government agencies that responding to Elon Musk’s “What did you do last week?” email is voluntary. Also, a Delta Air Lines flight is forced to return to the airport in Atlanta after the plane fills with smoke. Plus, the filmmakers behind the new Netflix docuseries about the death of Gabby Petito respond to backlash. And remembering the life and legacy of Secret Service agent Clint Hill, who notably leapt onto JFK’s limousine when he was shot in Dallas.