<P> United Nations staff can apply for SC online, at the website of the Department for Safety and Security . </P> <P> In the post World War II era, there have been several highly publicized, and often controversial, cases of officials or scientists having their security clearances revoked, including: </P> <Ul> <Li> Sandy Berger </Li> <Li> John M. Deutch </Li> <Li> Thomas Andrews Drake </Li> <Li> Abdel - Moniem El - Ganayni </Li> <Li> Wen Ho Lee </Li> <Li> Robert Oppenheimer </Li> <Li> Alan Turing (UK) </Li> <Li> Qian Xuesen </Li> <Li> Aldric Saucier </Li> <Li> Edward Snowden </Li> <Li> Michael T. Flynn </Li> </Ul> <Li> John M. Deutch </Li>

How do you get a top security clearance