John C. Stennis Space Center is celebrating its 50th anniversary in 2011. NASA announced plans to build a rocket engine test facility in Hancock County, Miss., on Oct. 25, 1961. A new anniversary logo highlights the theme of the anniversary year - celebrating Stennis as a unique federal city and its five decades of powering America's space dreams. Stennis is home to more than 30 federal, state, academic and private organizations and several technology-based companies. In addition to testing Apollo Program rocket stages that carried humans to the moon, Stennis tested every main engine used in more than 130 space shuttle flights.