John C. Stennis Space Center

The John C. Stennis Space Center (SSC) is a NASA rocket testing facility. It is located in Hancock County, Mississippi, on the banks of the Pearl River (Mississippi–Louisiana) at the Mississippi-Louisiana border. As of 2012, it is NASA's largest rocket engine test facility.

As of 2007, British manufacturer Rolls-Royce plc has been operating an outdoor aero engine test facility within SSC due to noise pollution concerns at its UK testing facility in Hucknall (near its main UK site at Derby). Rolls-Royce is just one of the over 30 local, state, national, international, private, and public companies and agencies using SSC for their rocket testing facilities.