America's foremost nuclear scientist who helped develop radar and nuclear weapons during World War II as part of the Manhattan Project and was he director of the National Bureau of Standards from 1945 to 1951. In the 1950s he became a target of suspicion during the McCarthy era.
He started making important research into quantum mechanics as a student, later writing classic textbooks on atomic theory and general physics, as well as becoming an advisor to politicians.
A House Un-American Activities Committee report called him the 'weakest link' in national security, and as a result his security was revoked, only to be reinstated, time and and time again.
He was born in Alamogordo, New Mexico, the hometown of space earthbound exploration experiments and his father was a supervisor of railroad building,
He was called to testify before HUAC with the charge that if he could be at the forefront of a radical movement called quantum mechanics, he could be at the forefront of another, he answered he was also a believer in laws discovered by Johannes Kepler and other great scientists of ages past.