A Major New Experiment in Voting, and the World’s Most Polluted Air

Plus, your Friday news quiz. Here’s what we’re covering: Federal Agencies Return to Work After Longest Shutdown in History by Eileen Sullivan U.S. Strike Kills 4 on Boat Trump Says Was Smuggling Drugs by Helene Cooper and Eric Schmitt Memo Blessing Boat Strikes Is Said to Rely on Trump’s Claims About Cartels by Charlie Savage and Julian E. Barnes Swalwell Denies Allegations of Fraud and Says Trump is Targeting Him by John Yoon Will People Trust Voting by Phone?