evidence: Federal officials do not secure TS/SCI information in this way. First, TS/SCI documents are so sensitive that only officials meeting a very high need-to-know bar are allowed to read them. TS/SCI-cleared officials must also follow standard procedures to conduct their TS/SCI "read." They must do so only in a government-approved sensitive compartmented information facility (SCIF), which is specially constructed and hardened to prevent unauthorized entry and electronic eavesdropping. For certain highly sensitive information, readers must sign their names on the document they read. They may discuss the TS/SCI content while in the SCIF but not when outside a SCIF. They read the TS/SCI documents in the presence of an intelligence officer, who later collects all TS/SCI documents, returns them to a TS/SCI-designated safe located within a SCIF, and logs in their return. No one may take a TS/SCI document out of the SCIF to their office or their home, even if there is a strong padlock on their office or personal safe. When an official leaves government service, they are "read out" of the TS/SCI program and cut off from further access to TS/SCI material. If an official loses a TS/SCI document, they can lose their TS/SCI clearance—or go to prison if they do something more damaging. These safeguards exist because the sensitivity of TS/SCI information is so grave.