CNN reported operatives involved in the agency's missions in Libya have been subjecte

....And sources say the CIA has been trying to keep its employees quiet.

CNN reported previously that some operatives involved in the agency's missions in Libya have been subjected to frequent -- even monthly -- polygraph examinations to find out whether they've have spoken to Congress or the media, according to sources with deep inside knowledge of the agency's workings.


http://www.cnn.com/2013/10/31/politics/benghazi-cia-hearing/index.html