Everest climber Joby Ogwyn still shaken after witnessing tragedy

Discovery Channel's Mount Everest special tracking veteran climber Joby Ogwyn ended in the worst possible way last month; as the crew was prepping to start the journey, the deadliest avalanche in the mountain's history killed 16 Sherpa guides. The network scrapped the live special, produced by NBC News, and will now air a documentary called "Everest Avalanche Tragedy" on Sunday night.