NASA

The National Aeronautics and Space Administration, the government department responsible for the United States of America's space program.

NASA's predecessor was the National Advisory Committee on Aeronautics (NACA), which was formed after World War I to promote aeronautical research and development in the United States. In 1959, the department was reorganized and given control of the space program, which had previously been undertaken separately by different branches of the military.

much more required here!

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External link:

• [NASA web site]