Delhi's Severe Air Pollution and Home Clean Rooms

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? Alaska Is Going to Find Out by Nick Corasaniti

An Escape From India’s Air Pollution for Those Who Can Afford It by Alex Travelli

Blue Origin Lands Booster After Rocket Launch and Matches SpaceX’s Feat by Kenneth Chang

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