Welcome to the jungle: It's fun and games in Brazil as the new season of the Hard Enduro gets underway. A top mountain biker rips through the darkness in a race through the night. The planet's best cliff divers explain how they make this most terrifying of sports look easy. Japan hosts the third stop of the Air Race World Series.

Welcome to the jungle: It's fun and games in Brazil as the new season of the Hard Enduro gets underway. A top mountain biker rips through the darkness in a race through the night. The planet's best cliff divers explain how they make this most terrifying of sports look easy. Japan hosts the third stop of the Air Race World Series.