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Department of the Air Force Plaque
In September 1947 the proposed
Air Force seal was exhibited in the office of the new Secretary of the Air Force, and later a panel of about thirty top-ranking Air Force officers reviewed it. The design had a green background and featured the Wright Brothers' airplane as the central point. The panel recommended that the background be blue and that a symbolic design replace the airplane. Mr. DuBois sketched Jupiter's thunderbolt, and it was adopted. The final drawing was approved by President Truman on 1 November 1947.
The predominant colors, gold and ultramarine blue, are the Air Force's colors as carried down from the Air Corps. The thirteen stars signify the original states, and the bald eagle is the symbol of the United States and of air striking power. The shield is divided by a nebula line formation, representing clouds, and the heraldic thunderbolt portrays striking power in the medium of air.