How high? How about 70, 000 feet? So high, you have to wear a full space suit to go there. So high that a loss of pressurization would cause your bodily fluids to boil in a matter of seconds. So high that … well, you get the idea. Watch for our clips of actor/director Gary Sinise’s flight to 70,000 ft. in a U2 spy plane, flying out of Beale AFB, California. It was a singular experience in an iconic airplane. In conjunction with the Gary Sinise Foundation, Sleeping Dog Productions detailed the training and flight in HD, for “High Flight”, a one hour documentary.