TO THE GREATEST HEIGHTS: Facing Danger, Finding Humility, and Climbing a Mountain of Truth

In the wake of the 2008 financial crisis, O'Brien's life was turned upside down. After years of climbing the corporate ladder to great success, her career went into a tailspin, and she found herself searching for a new purpose in life. She settled on an unlikely goal: climbing Mount Everest. Photos, most in color.