After becoming the youngest person to climb El Capitan in Yosemite by rope, 11-year-old Sam Evermore is now also the youngest American to climb the Matterhorn in the Alps. David Muir shares his story.
After becoming the youngest person to climb El Capitan in Yosemite by rope, 11-year-old Sam Evermore is now also the youngest American to climb the Matterhorn in the Alps. David Muir shares his story.