On March 13, 2011, Assistant Secretary of State for Near Eastern Affairs Jeffrey D. Feltman writes in an urgent email that Saudi Arabia and The United Arab Emirates are sending troops into the neighboring country of Bahrain to quash anti-government protests there. The email is sent to more than 20 other US officials, and then replied to and forwarded ten times in the next 24 hours. Recipients include Clinton, US Ambassador to Kuwait Deborah Jones, Homeland Security Adviser John Brennan, Deputy National Security Adviser Denis McDonough, and US Ambassador to the United Nations Susan Rice.
Feltman’s original email and some of the replies contain information later deemed classified. However, many of the emails in the chain are sent through the State Department’s unclassified system, state.gov, nicknamed “the low side,” instead of the department’s system for classified information, nicknamed “the high side.” Clinton’s private server is considered even less secure than “the low side.”
The New York Times will later report on the email chain to illustrate how widespread the emailing of obviously classified information through improper channels had become during this time period. (The New York Times, 5/10/2016) (US Department of State, 2/29/2016)