Baltimore/Washington International Thurgood Marshall Airport (IATA: BWI, ICAO: KBWI, FAA LID: BWI) is an international airport located in Linthicum in northern unincorporated Anne Arundel County, Maryland. The airport is 9 miles (14 km) south of downtown Baltimore and 32 miles (51 km) northeast of Washington, D.C.
1. staff sergeant-a noncommissioned officer ranking above corporal and below sergeant first class in the Army or Marines or above airman 1st class in the Air Force. sergeant-any of several noncommissioned officer ranks in the Army or Air Force or Marines ranking above a corporal.
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.