writes "Former 64-yr old french paratrooper Michel Fournier is attempting to break multiple world records by jumping out of a helium balloon at 40 kilometers (131,000 feet) altitude. They anticipate that he will break the sound barrier on the way down, taking 15 minutes to fall and reaching speed of over 1500km/hr.
The big concern at the moment is the wind. Anything over 10km/hr will cause problems getting the massive balloon inflated. The previous attempt failed when the baloon was destroyed by wind while still on the ground.