Mayor Bill de Blasio announced Tuesday that the start of the school year in New York City would be delayed until Sept. 21 to avoid a teachers’ strike over COVID-19 safety demands. WATCH THE FULL EPISODE OF 'WORLD NEWS TONIGHT': https://bit.ly/3lBlYsl WATCH OTHER FULL EPISODES OF WORLD NEWS TONIGHT: http://abc.go.com/shows/world-news-tonight WATCH WORLD NEWS TONIGHT ON HULU: https://hulu.tv/33iKepm #WorldNewsTonight #NYCSchools #COVID19