Why would Russia pay the Taliban to kill U.S. troops?

Ellen Nakashima explains the story behind Russia-backed bounties on American troops in Afghanistan. Sarah Kaplan explains the practical effects of a coronavirus mutation. And, Damian Paletta on the future of the fireworks industry.
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Intelligence assessments find that Russian bounties to Taliban-linked militants resulted in the deaths of U.S. troops.
This coronavirus mutation has taken over the world. Scientists are trying to understand why. 
Trump’s tariffs could fizzle fireworks, an American tradition that’s 95 percent made in China.
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