In July 2016, the State Department will reveal some limited details about 22 “top secret” emails involving Clinton. One email chain is sent sometime in 2012, and involves two “top secret” emails. The chain begins with an email written by an unnamed State Department official to other unnamed department officials. It makes its way to Sullivan, who forwards it to Clinton, Clinton’s chief of staff Cheryl Mills, and Deputy Secretary of State William Burns. Clinton then replies to Sullivan. Then there’s another back and forth between Clinton and Sullivan. The contents of the emails remain unknown. (Vice News, 7/22/2016)