sentences:  Accompanied by Lieutenant Charles D. McAllister of the Army Air Corps, Stevens took the first photograph of the Moon's shadow projected onto the Earth during a solar eclipse in August, 1932.On July 29, 1934, Stevens and two other Army Air Corps officers, Major William Kepner and Captain Orvil Arson Anderson, ascended in a specially-constructed balloon and gondola named "Explorer I" over north-western Nebraska in an attempt to break the current altitude record for manned flight.However, nearing the current record height, the balloon envelope ruptured, sending the gondola plunging to earth.