The U.S. Air Force shared that the B-21 Raider bomber plane is now testing its engines on the ground in California.
This is a crucial step for this advanced aircraft, which is the first of its kind in the world. The first actual flight of the B-21 will be closely watched by Northrop Grumman and the U.S. Air Force.
The B-21 Raider is a new bomber that's designed with the latest stealth technology, advanced networking features, and an open systems design. It will be a key part of the United States' bomber fleet.