Trump sets combative tone at NATO with attacks on allies

It's supposed to be a gathering of friends, but at certain moments, today's NATO summit sounded anything but friendly. President Trump's rhetoric on German energy sources and allied military spending set a combative tone. Still, NATO officials insist Trump's criticisms won't impact NATO's day-to-day operations. Judy Woodruff talks with Yamiche Alcindor and special correspondent Ryan Chilcote.

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