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.
Specialists can be promoted to corporal, the lowest rank of non-commissioned officer, or NCO. An NCO is an enlisted man with the responsibility to lead other soldiers. Corporals lead teams of a few soldiers within a squad. Each squad of as many as 10 soldiers is led by one or more sergeants or a staff sergeant. In squads with a staff sergeant, the staff sergeant commands any other sergeants in the squad.