Ski mountaineer Andrzej Bargiel becomes the first person to climb Mount Everest and ski back to Everest Base Camp without supplementary oxygen. After nearly 16 hours climbing in the high altitude “death zone” (above 8,000m where oxygen levels are dangerously low), Bargiel clipped into his skis on the summit of the tallest mountain on earth and started his descent via the South Col Route. He reached Camp II that night and rested - the summit ridge and Hillary Step had taken longer than planned, m...