LAHORE: Pakistani climber Sirbaz Khan has achieved a significant milestone by climbing up the Mount Everest without the use of artificial oxygen. This remarkable accomplishment makes him the second Pakistani to reach the summit of Everest without supplemental oxygen, following in the footsteps of Sajid Sadpara. Sirbaz Khan has now climbed 11 of the world’s 14 highest peaks without using supplemental oxygen. Khan is the first Pakistani to achieve this feat, demonstrating his extraordinary endurance and skill. Pakistani climbers have collectively summited 13 out of the 14 highest mountains in the world.