Katie Ledecky once again dominated a 1500m freestyle at the Pro Swim Series stop in Westmont, extending her 15-year, 40-plus-meet win streak in swimming’s longest event. #NBCSports #Swimming #Olympics #KatieLedecky » Subscribe to NBC Sports: youtube.com/nbcsports?sub_confirmation=1 » Watch Live Sports on Peacock: peacocktv.smart.link/v82e9dl56 NBC Sports Group serves sports fans 24/7 with premier live events, insightful studio shows, and compelling original programming. NBC Sports is an established leader in the sports media landscape with an unparalleled collection of sports properties that include the Olympics, NFL, Premier League, Big Ten, NASCAR, PGA TOUR, the Kentucky Derby, Tour de France and many more. Subscribe to our channel for the latest sporting news and highlights! Visit NBC Sports: nbcsports.com Find NBC Sports on Facebook: facebook.com/NBCSports Follow NBC Sports on Twitter: twitter.com/nbcsports Follow NBC Sports on ...