Peter Hillary and Jamling Tenzing Norgay, whose fathers scaled Everest for the first time, witnessed the Nepal earthquake and avalanche first hand.
The two men, old friends for decades, were, unbeknown to each other, leading separate trekking parties to Everest Base Camp when the earthquake hit.
By chance, they ended up taking refuge in the same monastery village.
"I pushed open the curtain that was in front of the door and he was sitting there in front of me," Mr Hillary said. "He jumped up and we gave each other a hug."