Who breached the air gap between classified systems and Hillary's unsecure system?  This did not happen.    In fact, today's information will eventually show that this didn't happen. Diplomats and State Department officials were sending these emails to each other before they hit Clinton's inbox. These were regular old emails sent to Clinton. This was not a case of classified DOCUMENTS being sent to Clinton.  This was a case people using their regular nonsecure government email accounts and sending regular emails to Clinton that CONTAINED classified info. Sometimes even a reference to a classified program makes the email classified. This is what happened with SAP emails as I will show in a second.   This is called "spillage."  And spillage was what happened with the emails sent to Clinton.   Who scrubbed the classified markings from these documents before emailing them to Hillary?  Nobody.  There were no classified documents sent to Hillary Clinton.  This came up in congressional testimony.  A classified document has to have Classification banners on the top and bottom every page and each paragraph needs to be marked with its own classification level like this  https://images.dailykos.com/images/271672/large/classification_markings.jpg?1467992488 Best practice is to use Cover Sheets like these  https://theuijunkie.com/wp-content/uploads/2017/05/differenceconfidentialsecrettopsecret.png The idea is that nobody handling a classified document should be unaware they are handling a classified document. And as you pointed out, the secure system SIPRNet is not connected to the regular internet, you can't mail one of these documents from SIPRNet to bob@state.gov or bob@gmail.com.  If you are just getting a regular email where classified info is not called out, it's not cut and dried to tell if it's classified, the person could have learned the info from a classified briefing or they could have learned from a newspaper in Pakistan. Or one agency could have treated it as classified and another does not.  When this first started they took a sample of Clinton's and checked for classifed info.  They found 4 emails with classified info.  Months and months later, they said at least three were actually not classified.  So even the folks doing a review can get this wrong.  Spillage of info is very common throughout the government because so much material is treated as classified. the SAP emails.  Who provided SAP program electronic documents to Hillary that she was not cleared for and not read into?  Nobody provided her SAP electronic documents.  They emailed vague references to an SAP, the CIA drone program.  These emails were vague and without names, dates, countries etc, because the officials knew they were communicating on the "low side," the nonsecure system  At the centre of a criminal probe involving Hillary Clinton’s handling of classified information is a series of emails between US ­diplomats in Islamabad and their superiors in Washington about whether to oppose specific drone strikes in Pakistan.  The 2011 and 2012 emails were sent via the “low side’’— slang for a computer system for unclassified matters ......  Some of the emails were forwarded by Mrs Clinton’s aides to her personal email account, .... The vaguely worded messages didn’t mention the “CIA”, “drones” or details about the militant targets, officials said.  Any reference to the CIA drone program is considered TS/SAP even though it's been publicly discussed by the president and national security advisor.  Emails sent over the low side sometimes were informal discussions that occurred in addition to more formal notifications through secure communications. One such exchange came just before Christmas in 2011, when the US ambassador sent a short, cryptic note to his boss indicating a drone strike was planned. That sparked a back and forth exchange among Mrs Clinton’s senior advisers over the next few days, in which it was clear they were having the discussions in part because people were away from their offices for the holiday and didn’t have access to a classified computer. The drone campaign, though widely reported in Pakistan, is treated as secret by the US government. Under strict classification rules, officials have been barred from discussing strikes publicly and even privately outside of ­secure communications systems.  https://www.theaustralian.com.au/nation/world/hillary-clinton-emailed-on-cia-drone-strikes-in-pakistan/news-story/efde9067d7fb60434e94f5b9300ada5d I believe the information today that showed 23 violations and 7 infractions will be about the State Department employees who used their nonsecure state.gov accounts to send or forward these emails.  And it goes beyond the State Department.  We know that nonsecure emails from CIA, the WH and the NSC were also sent....but this inquiry is only dealing with State.