It's about 22 thousand feet above sea level. It has been done before, but only very rarely, and only during the rare occasion that the weather would permit it.

It's about 22 thousand feet above sea level. It has been done before, but only very rarely, and only during the rare occasion that the weather would permit it. https://en.wikipedia.org/wiki/Didier_Delsalle https://en.wikipedia.org/wiki/Didier_Delsalle