An interim clearance allows a person to have access to collateral classified information (at the level requested without a caveat) while his or her final clearance is being processed. For example, a person with an Interim Secret may have access to a document marked Secret, but not a caveated one, Secret COMSEC..
Enlisted Air Force ranks are broken down into three levels: Airmen (E-1 through E-4), Non-Commissioned Officers (E-5 and E-6), and Senior Non-Commissioned Officers (E-7 through E-9). The Air Force is the only one of the five branches of the U.S. military where NCO status is achieved at the grade of E-5.
The Air Force is the only service that does not base E-5 and above promotion percentages on the job. The other services base their NCO promotions based on how many vacancies exist in the person's job. The Air Force, on the other hand, gives the same promotion percentage to all of their AFSCs (jobs).