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.

An 11-year-old boy from Colorado has now become the youngest American to reach the summit of the Matterhorn.

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