Under the provisions of Department of Defense 1348.33-M, the Secretary of Defense of the United States of America takes pleasure in awarding the Defense Superior Service Medal to Colonel (Signal Corps) Sherwood Clark Spring, United States Army, for exceptionally superior service to the Department of Defense with the Astronaut Johnson Space Center from 1980 to 1988. The distinctive accomplishments of Colonel (Signal Corps) Spring reflect great credit upon himself, the United States Army, and the Department of Defense.