As the U.S. and Russia meet in Geneva, Vladimir Putin sends troops into neighboring Kazakhstan, where protests over rising fuel prices have left 164 dead and some 6,000 arrested. Christiane speaks with senior Kazakh diplomat Erzhan Kazykhanov and former U.S. ambassador to Russia and former NATO deputy secretary general Alexander Vershbow. Plus, Sports Illustrated’s Jon Wertheim on the latest in the saga of tennis champion Novak Djokovic.

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