It is 29,028 feet of foreboding rock and ice: Mt. Everest. It has challenged and sometimes beaten even the bravest climbers. Among those who were willing to try: a 51-year-old professor who has only one foot. Last year, that climber, Tom Whittaker, tried to leave his footprint on Everest as the first disabled climber to make the ascent. 48 Hours Adventures takes you along as Whittaker takes his shot in "Against All Odds."