Joseph “Joe” Weinberg (1917-2002) was an American physicist.

Weinberg was a precocious young scientist who began his educational career at the age of 15 at the City College of New York. After receiving his M.S. from the University of Wisconsin, Madison, he arrived at the Radiation Lab at the University of California, Berkeley, in 1938. J. Robert Oppenheimer quickly took to the sharp young physicist, and Weinberg became part of an intimate group of Berkeley graduate students who worked with Oppenheimer at the Rad Lab. 

Many of those same students would receive opportunities to work at Los Alamos on the Manhattan Project. Weinberg, however, would not be given the chance, after it was discovered that he had ties to the Communist Party. In fact, in 1943, the FBI illegally recorded Weinberg discussing details about an atomic bomb–and the work being done at Berkeley to create one–with local Communist Party leader Steve Nelson.

In 1949, the House Un-American Activities Committee (HUAC) launched an investigation into Weinberg. At his hearing, he flatly denied ever having met Nelson. Despite this, HUAC branded him as “Scientist X” and accused him of spying for the Soviet government. Sensationalist media stories ran with the “Scientist X” moniker. One even accused Weinberg of hand-delivering uranium-235 to the Soviets.

The charges weighed heavily on Weinberg, and he was indicted for perjury in 1952. Even though he would eventually be acquitted less than a year later, he lost his professorship at the University of Minnesota and his career trajectory was negatively impacted. It would take him several years to restore his legitimacy in the field. He eventually became a distinguished professor at Syracuse University. 

http://www.atomicheritage.org/profile/joseph-weinberg

Edward Uhler Condon (March 2, 1902 – March 26, 1974) was a distinguished American nuclear physicist, a pioneer in quantum mechanics, and a participant in the development of radar and nuclear weapons during World War II as part of the Manhattan Project.^[3] The Franck–Condon principle and the Slater–Condon rules are co-named after him.

Edward Uhler Condon[1][2]
Born	March 2, 1902 Alamogordo, New Mexico, U.S.
Died	March 26, 1974(aged 72) Boulder, Colorado, U.S.
Citizenship	United States
Alma mater	University of California, Berkeley
Known for	Radar and nuclear weapons research, target of McCarthyism
Scientific career
Fields	Physics
Doctoral advisor	Raymond Thayer Birge

He was the director of the National Bureau of Standards (now NIST) from 1945 to 1951. In 1946, Condon was president of the American Physical Society, and in 1953 was president of the American Association for the Advancement of Science.

During the McCarthy period, when efforts were being made to root out communist sympathizers in the United States, Edward Condon was a target of the House Un-American Activities Committee on the grounds that he was a ‘follower’ of a ‘new revolutionary movement’, quantum mechanics; Condon defended himself with a famous commitment to physics and science.

Condon became widely known in 1968 as principal author of the Condon Report, an official review funded by the United States Air Force that concluded that unidentified flying objects (UFOs) have prosaic explanations. The lunar crater Condon is named for him.

https://en.wikipedia.org/wiki/Edward_Condon