Michael Heyman, that 'I believe that nothing less than my stepping down from the directorship will satisfy the museum's critics and allow the museum to move forward with important new projects.' Martin Harwit, said in a letter of resignation to the Smithsonian's secretary, I. The director of the Smithsonian Institution's National Air and Space Museum resigned today, citing the 'continuing controversy and divisiveness' over the exhibit of the Enola Gay, the B-29 bomber that dropped the atomic bomb on Hiroshima 50 years ago.
