Former and current mountaineers will celebrate the 60th anniversary of Sir Edmund Hillary's historic ascent of Mount Everest.
Mountaineers will gather in London to join the sons of the first men to reach the summit at the signing of a newly-released book on the expedition.
Sixty years ago today Sir Edmund and Tenzing Norgay became the first men to reach the 29,028ft (8,848 metres) summit on May 29 1953.
The Queen and the Duke of Edinburgh will attend a reception to mark the anniversary this evening at the Royal Geographical Society where they will watch footage from the time, view an exhibition and meet families and guests.
Sixty years ago, Sir Edmund Hillary and Tenzing Norgay became the first men in history to reach the summit of Mount Everest.
A Russian daredevil completed the world's highest ever base jump by leaping from from Mount Everest in Nepal.