On a historic trip to Canada, the Pope apologized to Indigenous communities for the Church's role in a residential school system that forcibly assimilated Indigenous people, leaving lasting trauma. WATCH NIGHTLINE EPISODES: https://abc.go.com/shows/nightline ALSO AVAILABLE ON HULU: https://hulu.tv/2wSmSrZ #nightline #pope #popefrancis #religion #catholic #catholicchurch #abcnews