Flight Support Booster Test #2 - July 21, 2022

This is a short video capturing the raw power of a 5 segment solid rocket motor during a static test. This is the largest solid rocket motor in the world that is designed for flight. There are 2 similar solid rocket motors attached to the side of the orange external fuel (with 4 shuttle heritage main engines) as seen on NASA's SLS moon rocket.
This video starts about 1 minute before ignition with a warning siren. There will be a puff of smoke at the back or nozzle just before ignition. During the 125 second test, one might notice the nozzle moving to different angles as it is designed to gimbal and help steer the massive rocket during flight. As the propellant burns out, liquid CO2 is injected into the front and back ends of the booster to stop the burning process so engineers can examine the internal structure of the booster after it is depleted.
The Flight Support Booster Test #2 or FSB-2, occurred on July 21, 2022 at Northrop Grumman's test facility near Promontory, Utah.
The static test lasted about 125 seconds. During the launch of a SLS rocket, approximately 75% of the thrust and steering capability is provided by the 2 solid rocket motors.