Felix Baumgartner jumped from a capsule dangling from a balloon at 128,120 feet today, breaking the record for the highest altitude skydive in history. Baumgartner’s top speed was officially Mach 1.24, or 833.9 miles per hour, making him the first human to break the sound barrier outside of an aircraft. Even though Baumgartner detected a problem with a heater designed to keep his visor clear, he leapt from the capsule anyway, parachuting safely to earth