Conversation so far:
Who did Edmund Hillary marry?
Hillary married Louise Mary Rose.
What day did they marry on?
3 September 1953, soon after the ascent of Everest.
What did he say about it?
he admitted he was terrified of proposing to her and relied on her mother to propose on his behalf.
What are his childrens names?
They had three children: Peter (born 1954), Sarah (born 1955) and Belinda (1959-1975.
What was so special about them?
Louise and Belinda were killed in a plane crash near Kathmandu airport shortly after take-off.
Who did he marry next?
In 1989 he married June Mulgrew, the widow of his close friend Peter Mulgrew, who died on Air New Zealand Flight 901 in 1979.
What happened next?
His son Peter Hillary also became a climber, summiting Everest in 1990.
In May 2002 Peter climbed Everest as part of a 50th anniversary celebration.

Question: Who else was part of the travel?
Self-contained rewrite: Who else was part of the travel besides Peter Hillary?