SLS Five Segment Booster (FSB-1)
Launching 5.5 million pounds is impossible. Until it's not.
![FSB-Web-1 Twilit sky of a five segment rocket motor resting on platform under a star-filled sky](https://cdn.northropgrumman.com/-/jssmedia/wp-content/uploads/FSB-Web-1.jpg?mw=3840&rev=2df69c6da5344a4b8afb8f72283d9a71)
![FSB-Web-5 Motor during test fire](https://cdn.northropgrumman.com/-/media/wp-content/uploads/FSB-Web-5.jpg?h=1271&iar=0&w=2000&rev=90144af7775e4dfc8ee599be070ae3a5)
FSB-1 Static Test
FSB-1 firing at the Promontory, Utah, facility’s Test Area.
Video Gallery: FSB-1
![FSB-Two-Segments-SLS A engineer stands in between the center of a rocket motor inside a facility](https://cdn.northropgrumman.com/-/media/wp-content/uploads/FSB-Two-Segments-SLS.jpg?h=1607&iar=0&w=2487&rev=50b2e0dba6f04012a1d707cba65a6cd5)
SLS Five Segment Booster
Engineers mate two segments of the five-segment booster.
Mission Updates
Our FSB-1 static test occurred on September 2. See the full static test below.