Pakistan, May 18 -- Pakistani mountaineer Sirbaz Khan has made history by becoming the first Pakistani to summit all 14 of the world's 8,000-metre peaks without using supplemental oxygen. He completed this extraordinary achievement on Sunday by reaching the summit of Kangchenjunga, the world's third-highest mountain at 8,586 metres.

Khan, who hails from Hunza Valley, had already climbed all 14 "eight-thousanders" previously, but he had used bottled oxygen on two of them. Determined to meet his original goal, he returned this year to re-climb Annapurna in April and Kangchenjunga in May, both without any oxygen support.

"When I first set out after summiting Nanga Parbat in 2017, my mission was to complete all 14 peaks without oxygen," Kha...