Max Pearson presents a collection of this week’s Witness History episodes focusing on Mount Everest, the highest mountain in the world.

It's 70 years since Edmund Hillary with Sherpa Tenzing Norgay, became the first people to reach the summit of Everest in 1953.

We hear about some of the earliest, tragic attempts to scale the mountain, and from those who've blazed a trail up the slopes for others to follow.

Contributors: Peter Hillary - Sir Edmund Hillary's son.Jamling Tenzing Norgay - Tenzing Norgay's son.Bachendri Pal - the first Indian woman to scale Mount Everest.Michael Groom - a survivor of the tragic expedition in 1996 when a storm struck the mountain.Jochen Hemmleb - an original member of the team that discovered George Mallory's remains.

(Photo: Sherpa Tenzing Norgay and Edmund Hillary after their return from Everest. Credit: Bettmann)