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Francisco Martin works on his iPad while laying in a hypoxic tent, a low-oxygen tent that mimics thin air at high altitude, in his apartment on April 15, 2021 in Brooklyn, New York, as he prepares for his expedition to climb Lhotse in the Himalayas. - Mountaineer Akash Neggi is fully prepared to take on the world's highest mountain – after spending several weeks sleeping in a tent in his living room in New Jersey. As Nepal battles the Covid-19 pandemic, a growing number of climbers are turning to oxygen-deprivation tents to cut down on the risk of being exposed to the virus by spending less time in the Himalayan nation.Everest aspirants typically spend eight days trekking from Kathmandu to base camp at 5,364 metres (17,598 feet), using the journey to acclimatise to high-altitude conditions. (Photo by Angela Weiss/AFP Photo)
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