Jimmy Fallon July 20, 2017 4:22 am ‘Tonight': Harry Styles Takes Over Fallon's Desk Jimmy Fallon has Harry Styles make a special wish, before the singer takes over the host’s desk. US & World Videos 2:39 Bruins try not to ‘dwell on the past' ahead of Game 7 against Toronto Maple Leafs 20:50 Karen Read trial: How accounts of first responders have differed 2:43 ‘On the Dot' to redevelop stretch of Dorchester Avenue 1:49 Finalists in math competition hope their model helps ease housing crisis 14:31 @Issue extra: Seth Moulton on pro-Palestinian protests, TikTok and more