Stoltenberg reflects on NATO summit

NATO leaders are hailing the Madrid summit as a victory for the alliance, as it is set to welcome two new members and significantly beef up its deterrent posture in Europe. But while the shifts are undoubtedly historic, the real test for the alliance is in Ukraine, where Russia continues to encircle and pound cities in the Donbas region. NATO Secretary General Jens Stoltenberg has been key to getting members across the finish line in Madrid, and Christiane spoke with him as the summit concluded. 

Also on today's show: US Senate Democrat Chris Coons; Jamal Greene, author of How Rights Went Wrong.

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