NPR News

CTE has been part of the national lexicon in the U.S. since the 2015 movie Concussion dramatized the discovery of this degenerative brain disease in football players.

Most teens today own a smartphone and go online every day, and about a quarter of them use the internet "almost constantly," according to a 2015 report by the Pew Research Center.

Now a study published Tuesday in JAMA suggests that such frequent use of digital media by adolescents might increase their odds of developing symptoms of attention deficit hyperactivity disorder (ADHD).

Japan and the European Union have signed a massive trade deal that creates an open trade zone for more than 600 million people. The EU and Japan account for approximately one-third of GDP worldwide.

The deal has been in the works for years, but the parties reached an agreement in principle several months after President Trump pulled the United States out of the Trans-Pacific Partnership, a major trade deal with Japan and 10 other nations.

Robert Kagan is a senior fellow at the Brookings Institution and the author of the forthcoming book The Jungle Grows Back: America and Our Imperiled World.

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