Watch: 2 Americans reach top of 'unscalable' Yosemite wall

Two climbers from America, 30-year-old Kevin Jorgeson of California and 36-year-old Tommy Caldwell, became the first in the world to use only their hands and feet to scale a 3,000-foot sheer vertical granite face in California's Yosemite National Park. The trek up the world's largest granite monolith, which is considered the most difficult rock climb, began on December 27. Each trained for more than five years, and they have battled bloodied fingers and unseasonably warm weather.