AdvertisementHow NATO's expansion helped drive Putin to invade UkraineUpdated February 24, 2022Becky SullivanfacebookEmailRussian President Vladimir Putin chairs a meeting with members of the U.N. Security Council via a videoconference at the Novo-Ogaryovo state residence outside Moscow on Friday. (Sputnik/AFP via Getty Images)This article was originally published on January 29, 2022.