SLS Five Segment Booster (FSB-1)
Launching 5.5 million pounds is impossible. Until it's not.


FSB-1 Static Test
FSB-1 firing at the Promontory, Utah, facility’s Test Area.
Video Gallery: FSB-1

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.