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Jan. 1961 Popular Science story starring William O'Sullivan Jr, who headed Project Echo and the whole satelloon paradigm at the fledgling NASA.
greg.org: the making of greg 2010
During the early 1960's, Goddard launched the Echo I and Echo II satelloon projects.
The mystery to be solved was whether or not this bit of mylar was from Goddard's Echo II satelloon project.
History Detective Zuberi turned to retired NASA engineer and self-professed Echo satelloon historian Ron Muller for help in solving the mylar mystery.