Guests: Roger Easton and his son Richard Easton were the guests for this Space Show program. Roger Easton was the designer of the Vanguard 1 satellite, which was key to the Vanguard project, and was the person who conceived, patented, and led the development of critical enabling technologies for the US GPS system. He was also the recipient of the National Medal of Technology which was awarded to him in November 2005. We started the discussion with Roger Easton about Vanguard and the precursor program, the Viking Sounding Rocket program.