( CNN) Sixty-four years ago, Tenzing Norgay, who’s also known as Sherpa Tenzing, and Sir Edmund Hillary became the first two people to reach the summit of Mount Everest, the world’s tallest mountain.

This 2015 photo presents a remote position of Mount Everest in China’s Tibet Autonomous Region.

Tenzing Norgay, also known as Sherpa Tenzing( centre ), and Edmund Hillary( right) return to Britain after becoming the first humen to scale Mount Everest.

Tents and flags at Everest Base Camp in 2012.

An avalanche hittings climbers on Everest after the 2015 earthquake. Jost Kobusch posted the video to YouTube a day after the quake.