it wasn't until 19 years after the mallory expetition that two men made it to the top of the mountain and returned to share their story. edmond hillary and norway reached the peak at 11:30 in the morning on may 29, 1953. the two spent only 15 minutes atop the mountain. as hillary told the story, both men reached the summit at the same time. >> we had been climbing together. i think we became a fairly heavy pair. this was just one example of how together you are. and how one is always protecting the other. i was leading down the asphalt. when i was passing a crevase a large piece of ice came down. and he pulledded me up so i didn't go very far. >> how did it feel up there on top of the world? >> very happy. >> in 2003, sir edmond hillary son's talked about how he celebrated the 50th anniversary of his father's achievement when climbing that mountain. >> there's a lot of times you want to be some where else. because the jet stream blasting over the top. but when you reach there it's incredible uplifting experience. it's very exciting. >> so you took a film crew along with national geogr