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Is a Gluten-Free Diet Bad for You?

Some Olympic athletes are doing it, but some experts say this diet isn't for everyone.
07/31/2012
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Nightline 10/24: Teen Gunman Terrorizes Wash. State High School
The Stunt Double Duo Behind Hollywood's Most Epic Fight Scenes; Proboscis Monkeys, Nature's Swingers

Teen Gunman Terrorizes Wash. State High School

Teen Gunman Terrorizes Wash. State High School

Police say freshmen Jaylen Fryberg opened fire in his school cafeteria, killing himself and another student.

The Stunt Double Duo Behind Hollywood's Most Epic Fight Scenes

The Stunt Double Duo Behind Hollywood's Most Epic Fight Scenes

Chad Stahelski and David Leitch's work is in almost every recent action movie, but they take on a new role with "John Wick."

Proboscis Monkeys, Nature's Swingers

Proboscis Monkeys, Nature's Swingers

These rare monkeys found deep in the jungles of Indonesia have an unusual sex life.