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.
A Marine platoon sergeant is the senior noncommissioned officer in the unit, which generally is composed of about 40 Marines. In most cases, a platoon sergeant holds the rank of staff sergeant, pay grade E-6, and has been a Marine for at least four years, at least two of them as a sergeant. Many Marine platoon sergeants have taken special small unit leadership training, especially the Infantry Unit Leadersâ Course at Camp Geiger, North Carolina.