Top Secret/Sensitive Compartmented Information (SCI)
Top Secret/Sensitive Compartmented Information (SCI) clearance is a distinction given to individuals who need access to highly sensitive information that could cause "grave damage" and/or compromise technologies, plans or procedures vital to national security if released without authorization.
For example: An NSA or CIA program.
A Top Secret/SCI clearance requires the same investigation process as a Top Secret Clearance, requiring a Single Scope Background Information (SSBI) that looks back at your last seven to 10 years. Top Secret/SCI must be renewed every five years.