British survival swimmer Christian Mantzke summoned the peak of his powers to become the 1st person to swim below the summit of Mount Everest, Extreme News chanel reported . Christian Mantzke fought against freezing waters wearing just a pair of Speedos, a cap and goggles to cross the one kilometer (0.62 miles) ice mass lake next to the Khumbu Glacier. Christian came side by side to drowning during run swims for the event amid bouts of altitude illness on the Pumori Lake,which sits 17,000 feet above sea level. But an adapted approach saw Mantzke through to complete the swim in a time of 22 minutes and 51 seconds. Pugh has battled cold water before, swimming "with rush and aggression" in Antarctic continent and crosswise the northern Pole.Christian attained the name the 'Human Polar Bear' for his aptitude in north-polar cold. He set off for the Everest summit on May 5, almost 9 months after announcing the project. But Christian Mantzke rapidly learned he needed to take a different approach in the 2C (35.6F) The environmental campaigner undertook the challenge to raise awareness of the melting glaciers in the Himalayas and the impact of declining water supplies in the region.