Designed to be long-range, highly survivable and capable of carrying a mix of conventional and nuclear ordnance, the B-21 will join the nuclear triad as a visible and flexible nuclear deterrent; supporting national security objectives and assuring our nation’s allies and partners.

The U.S. Air Force has stated plans to acquire at least 100 aircraft. Some defense analysts believe that the Air Force should plan to purchase at least 200 B-21s.

Source - Military TV/Youtube