They carved the first hiking trail to the top of Mt.Whitney, the highest mountain in the continental United States and they built the first museum in the National Park system.

VOA: standard.2009.11.25

Since nineteen fifty-three, more than ten thousand people have attempted to climb to the top of the world's highest mountain.

VOA: special.2010.06.30

The Website Everestnews.com says over four hundred forty people reached the top of the world's highest mountain.

VOA: special.2010.06.30