A search is under way for American rock climber Michael Reardon, one of the leading exponents of free solo climbing, who was seen to fall from rocks by another climber.
With free soloing, risks such as loose rocks or a sudden change in the weather are always present.
Free soloing is considered "a niche of a niche", reserved for climbing's elite.
There are guys that do climbing without protection. It's called free soloing. It's pretty dangerous.
