http://investigations.nbcnews.com/_news/2013/08/29/20234171-snowden-impersonated-nsa-officials-sources-say?lite

“Every day, they are learning how brilliant [Snowden] was,” said a former U.S. official with knowledge of the case. “This is why you don’t hire brilliant people for jobs like this. You hire smart people. Brilliant people get you in trouble.”