"The Secretary of Energy on Friday nullified a 1954 decision to revoke the security clearance of J. Robert Oppenheimer, a top government scientist who led the making of the atomic bomb in World War II but fell under suspicion of being a Soviet spy at the height of the McCarthy era."

https://www.nytimes.com/2022/12/16/science/j-robert-oppenheimer-energy-department.html?action=click&module=Well&pgtype=Homepage&section=Science