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.
Senior master sergeant (SMSgt) is the eighth enlisted rank (pay grade E-8) in the U.S. Air Force, just above master sergeant and below chief master sergeant and is a senior noncommissioned officer (SNCO). According to Air Force Instruction 36-2618, The Enlisted Force Structure :