Anything over that, you really risk heading to a memorial at the bottom of the mountain. That's why on K2, I was worried about our team. Our team's summit was 16 hours. You know, when I'm looking ...

The Hornbein Couloir poses a fantasy ski descent that only two parties have ever attempted. Neither was successful.

Lawrence Yu heads tech firm’s department which won Bronze Edison Award for excellence at industry’s ‘Oscars of innovation’.