The arrival of American fortresses at so great a height over Brest was {the achievement of experts. in. halt fa'dozen selenees, At this level all Problems of high altitude Aying fame acute, Crews are given a courte In pressure chambers before they begin to fly the fortresses, There they regulate their own oxygen sup~ "Become unconscious for a few seconds piyand ate toa to tet themselves
that Its nothing to be frightened of, anat once so that they may realize Crews understand their own Idiomercies and learn how to control them flying,
Text read from the printed page and cleaned; old type leaves the occasional error.