There’s no fallback on Everest, so what drives climbers to the challenge?

Two Irishmen were among 11 killed this season on the world’s highest mountain. What draws climbers to the challenge? asks Lorna Siggins

When boxer Katie Taylor flew into Dublin Airport earlier this month, few among the crowd gathered to greet the newly crowned, female lightweight boxing world champion would have known that Co Down mountaineer Noel Hanna was also arriving.