Alison Levine April 6, 2011

Team Captain of the 1st American Women's Everest Expedition and Groundbreaking Polar Adventurer -- Alison Levine is no stranger to risk-taking. She's survived sub-zero temperatures, hurricane-force winds, sudden avalanches, and a career on Wall Street. Levine was born with a life-threatening heart condition that precluded most demanding physical activities. After her initial diagnosis she had surgery that changed her life -- and climbing stairs soon gave way to climbing mountains.