STENNIS SPACE CENTER, Miss. – The last Space Shuttle Main Engine test was conducted this afternoon at this South Mississippi NASA center. The test marked the end of 34 years of testing space shuttle main engines at Stennis. The center’s new mission is helping NASA prepare for the next era of human spaceflight, the Constellation Program. Last year and the year before Stennis did component tests for the J-2X engine that will be used in the program. A new test stand is being built at Stennis for future J-2X testing. (Source: Tcp, 07/29/09)