American prepares for 110-day journey across Antarctica

made it to Antarctica. >> American explorer Colin O'By tonight on the ground in Antarctica. >> You know, it's pretty bare bones and gorgeous.>> Making final preparations to do something he says no human has ever done. Crossing the entire continent from ice shelf to ice shelf, solo and unsupported. >> I'm really curious if I can go back and push myself not just farther in distance than I went last time, but actually sort of in a spiritual context, mind, body, soul.To me, there's no better proving ground for ...