At 18, Mark Pfetzer has done more than many of us would imagine doing in a lifetime.  At 11, he earned a black belt in Karate. At 12, he began rock-climbing.  Since age 14, he has climbed nine of the world's most challenging mountains.  He was the youngest to summit on four and the expedition's youngest climber on three more.  At 15, he climbed Everest from the difficult North side, then returned a year later for a second summit attempt from the South side in 1996. ... More >