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The story of the Echo communications satellite project, and how scientists learned to bounce a radio signal off a big balloon. Written by Robert Engel and Leo S. Rosencrans. Narrator: Larry Thor. Producer and Photographer: Jerry Fairbanks. Editor: Richard Fritch, ASC. Production Manager: John McKennon. Assistant Director: Robert Scrivner. Musical Direction: Edward Paul. Original Score: Gene Kauer. Sound: Lawrence Aicholtz. Lighting: Grant Spicer.
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