Three years after becoming the youngest person to summit Yosemite's El Capitan rock formation, 11-year-old Sam Evermore has just shattered another world record.

An 11-year-old Colorado climber made history as the youngest American to summit the Matterhorn. David Muir talks with the father-son duo about their remarkable journey.

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.

COLORADO SPRINGS, Colo (KRDO) -- We have an exciting Colorado Champions update! Over the weekend, Colorado Springs' Sam Evermore accomplished what he set ...