The Science of Space Dive (pt 2/6) - The balloon
Felix Baumgartner's mission depended on one of the least heralded but most remarkable pieces of equipment - a balloon. To take him 24 miles above the earth’s surface, Felix flew the largest manned balloon ever. It was as tall as a fifty-storey building and held 30 million cubic feet of helium. So even before Felix jumped he had entered the record books.