Show after record stratosphere sub flight 4 11 F V V IK va 41 A i letts left milo burcham fa famous motis test pilot for lockheed climbing out of P 38 at ai burbank calif after he had given the pursuit plane speed and altitude tests in the stratosphere sub right chief test pi pilot lot marshall headle beadle tur turns burnson on the oxygen as Bur burcham charn starts pedaling a bicycle for 30 minutes to supercharge himself for his flight high above grou ground fid while pedaling he breathes only pure oxygen |