May 22, 2010 CNN’s Brian Todd looks at a planned attempt to sky dive from the edge of space, testing the limits of the human body. Follow UFO Report on Twitter @ Skydiver preparing for 120,000-foot supersonic fall From Dugald McConnell and Brian Todd, CNN May 21, 2010- New York (CNN) — An Austrian daredevil is planning to become the first person to break the sound barrier in a free fall, without riding in a vehicle.  This summer in New Mexico, Felix Baumgartner hopes to make the highest, longest and fastest fall ever. His attempt will take him to an altitude where the atmosphere ends and space begins -- where blood boils at body temperature, and the air temperature could be as low as minus 70 degrees Fahrenheit. The first step in the attempt will be riding a helium balloon to an altitude of 120,000 feet above sea level -- almost 23 miles -- higher than anyone has ascended in a b