Rock star of the climbing world
Alex Honnold has conquered a string of daunting cliff faces across the globe with no fear, no back-up... and no rope.
Alex Honnold made his name at the age of 23, when he free climbed Yosemite's Half Dome in just two hours and fifty minutes, an ascent which usually takes between one or two days.
There is a famous image of me standing on a ledge around 1700 feet up on the Northwest Face of Half Dome, explained Alex Honnold.
My back is to the cliff wall and below is a sheer drop.
It is part of the route to the top and has to be traversed by all climbers of Half Dome, with or without rope.
Some climbers wade down and edge themselves across with their arms along the ledge.
Some climbers sit on their backsides and edge themselves across that way.
I felt though, that walking across it was cooler.
It is around a foot wide at the start, but narrows to six inches by the end.
By the end, the cliff wall bows out and pushes your back forwards so that you are literally peering over the sheer drop.