On GZERO World with Ian Bremmer, Mai Elliott recalls how witnessing the human toll of the Vietnam War firsthand changed her views—and forced her to keep a life-altering secret from her own family.

As a young researcher in Saigon working for the RAND Corporation during the Vietnam War, Mai Elliott had a rare window into the lives of North Vietnamese fighters and rural civilians. What she saw challenged everything she had been raised to believe. “I came from a very anti-communist family... but I began to change my views because I thought it was unjust for the peasants to pay for the cost of the war,” she says.