Portaledge camping at Yosemite.
British climber John Roberts in South Africa.
Ice climbing a frozen waterfall.
Extreme kayaking at Victoria Falls.
Blake Aldridge dives 29 meters from the rock monolith during the Red Bull Cliff Diving World Series in Portugal.
A death-defying act by Eskil Rønningsbakken in Norway.
Base jumping in Yosemite.
A ride at the Stratosphere Tower in Las Vegas.
Driving down a sand dune in Lucky Bay, Australia.
- It's time: Hillary Clinton and Donald Trump will face off tonight at 9 p.m. ET in the first of three US presidential debates.
- Inside the final days of the FARC, Colombia's 50-year-old rebel group, which is on the verge of signing a peace treaty with the government.
- Golf legend Arnold Palmer has died at 87. Known as "The King," his unusual style and charisma changed the game.