Rio 2016: U.S. Swimmer Katie Ledecky Is in a League of Her Own
A virtual unknown in 2012, Katie Ledecky is now one of the most dominant female swimmers in the world. She’s already won a gold medal — and smashed her own world record.
The most popular Nightly News health, consumer news, aviation, lifestyle and human interest stories.
Watch our intimate, first-person documentary shorts about people, places and stories you may not have otherwise discovered.
Watch the best of Nightly’s international reporting.
Stay up-to-date on the latest health and medical news.
Coverage of extreme weather events affecting people across the country.
The best political reporting from Nightly News and the NBC News politics team.
Full Episodes of Nightly News
Watch full episodes of NBC’s Nightly News with Lester Holt.