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In shadow marketplaces, positive reviews for Amazon products are bought and sold. The company says it's cracking down and that it estimates that less than 1 percent of reviews are fake. Mike Segar/Reuters hide caption

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Mike Segar/Reuters

Some Amazon Reviews Are Too Good To Be Believed. They're Paid For

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The American Civil Liberties Union says that Amazon Rekognition, facial recognition software sold online, inaccurately identified lawmakers and poses threats to civil rights — charges that Amazon denies. Leon Neal/AFP/Getty Images hide caption

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Leon Neal/AFP/Getty Images

Amazon Is More Than A Shopping Site. It's A Search Engine Too

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In his new job overseeing health coverage for 1.2 million workers and their families, Atul Gawande says he hopes to find specific ways to make health care more efficient and the solutions exportable. Dan Bayer /The Aspen Institute via Flickr hide caption

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Dan Bayer /The Aspen Institute via Flickr

An image from a presentaton by Amazon's Ranju Das shows a demonstration of real-time facial recognition and tracking. Das said the video came from a traffic cam in Orlando, Fla., where police were in a pilot program of Amazon's Rekognition service. Amazon Web Services Korea via YouTube/Screenshot by NPR hide caption

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Amazon Web Services Korea via YouTube/Screenshot by NPR

Dr. Atul Gawande has been picked to lead the high-profile joint venture in health care formed by Amazon, Berkshire Hathaway and JP Morgan Chase. Mint/Hindustan Times via Getty Images hide caption

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Mint/Hindustan Times via Getty Images

Atul Gawande: Medicine Has Become A Team Sport.

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Close to two-thirds of Americans say they've bought something on Amazon, according to a new NPR/Marist poll. That's more than 90 percent of America's online shoppers. James Yang for NPR hide caption

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James Yang for NPR

What Americans Told Us About Online Shopping Says A Lot About Amazon

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Washington, D.C., is competing against its suburbs in Virginia and Maryland for Amazon's second headquarters. Nicholas Kamm/AFP/Getty Images hide caption

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Nicholas Kamm/AFP/Getty Images

D.C. Un-United: Amazon's Second HQ Pits City Vs. Its Suburbs

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Packages move down a conveyor system to the proper shipping area at the new Amazon Fulfillment Center in Sacramento, Calif., on Feb. 9. Amazon's profits, announced on Thursday, roughly tripled what analysts had been expecting. Rich Pedroncelli/AP hide caption

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Rich Pedroncelli/AP

The Amazon logo in Santa Monica, Calif. Amazon Web Services has government contracts that show its influence is far beyond the post office. Reed Saxon/AP hide caption

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Reed Saxon/AP

Alexa, Tell Me A National Security Secret: Amazon's Reach Goes Beyond The Post Office

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President Trump's executive order comes after months of criticism of the U.S. Postal Service for what the president claims is a money-losing deal to deliver packages for Amazon. Smith Collection/Gado/Getty Images hide caption

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Smith Collection/Gado/Getty Images