"When it comes to delivering America’s resolve, the B-21 Raider will be standing by, silent and ready. We are providing America’s warfighters with an advanced aircraft offering a combination of range, payload, and survivability. The B-21 Raider will be capable of penetrating the toughest defenses to deliver precision strikes anywhere in the world. The B-21 is the future of deterrence."
https://www.northropgrumman.com/what-we-do/air/b-21-raider/
"The B-21 Raider will be a dual-capable penetrating strike stealth bomber capable of delivering both conventional and nuclear munitions. The B-21 will form the backbone of the future Air Force bomber force consisting of B-21s and B-52s. Designed to operate in tomorrow’s high-end threat environment, the B-21 will play a critical role in ensuring America’s enduring airpower capability."
https://www.af.mil/About-Us/Fact-Sheets/Display/Article/2682973/b-21-raider/
"The US Air Force has unveiled a new artist rendering image of its top-secret B-21 Raider stealth bomber.
The bomber, which will be able to carry nuclear weapons, will cost the military more than $600 million per plane, and more than 100 of them are on order."
https://www.msn.com/en-us/news/us/air-force-reveals-new-pictures-of-classified-dollar600m-b-21-bomber/ar-AALWiei
"The B-21 will incrementally replace the B-1 Lancer and B-2 Spirit to perform both conventional and nuclear missions alongside the B-52 Stratofortress. As the Air Force transitions to a two-bomber fleet, the strategy to beddown the new bomber has been to minimize operational impacts, maximize reuse of existing facilities and reduce overhead as much as possible.
“Maintaining the lethality and readiness of Air and Space Forces’ requires continuous sustainment and modernization of mission-critical infrastructure,” said Col. Dave Norton, deputy director of AFCEC’s Facility Engineering Directorate."
http://www.militaryspot.com/news/air-force-preparing-for-b-21-raider-stealth-bomber
"Since an announcement in September, news has been buzzing about five Northrop Grumman B-21 Raider Stealth Bombers that are on the production line in California. U.S. Air Force Secretary Frank Kendall revealed this intel at the Air Force Association’s Air, Space and Cyber Conference in National Harbor, Maryland."
https://www.hotcars.com/b-21-bomber-brief-history/
"According to Bloomberg News, which cited “new service estimates,” the B-21 stealth bomber will cost taxpayers $203 billion through the 2050s"
https://www.19fortyfive.com/2021/11/b-21-raider-the-200-billion-stealth-bomber/
"The Air Force has a logistics problem: once the Raider enters service, the U.S. Air Force will separately be flying four different bomber aircraft, several of which overlap substantially in their intended missions."
https://nationalinterest.org/blog/reboot/introducing-b-21-raider-has-one-glaring-logistics-issue-193481
"United States Secretary of the Air Force Kendall, in a recent interview with the media, said that the US Air Force has tried its best to find funding for the stealthy strategic bomber program B- 21 Raider, the backbone of America’s future strategic bomber.
US media on November 17 quoted General Kendall as emphasizing that the B-21 stealth bomber can not only perform nuclear and conventional bombing missions but also act as an airborne command vehicle for UAVs. B-21 acting as a mothership could control multiple drones attacking several targets over a wide area simultaneously, overwhelming an adversary’s ability to counter them."
https://defenceview.in/is-the-us-b-21-capable-of-bypassing-any-chinese-radar-system/
"Recent reports about the B-21 Raider suggest that the plane might have a mission that U.S. bombers have not had for a very long time: air-to-air combat. If the Air Force continues to pursue this line of thought, it will revive a concept that dominated airpower theory in the early age of aviation, but that fell by the wayside because of technological and operational concerns in the 1950s and 1960s"
https://nationalinterest.org/blog/reboot/could-america%E2%80%99s-b-21-bomber-also-be-stealth-fighter-198522
Northrop Grumman now has five B-21 stealth bombers in production
https://www.defensenews.com/air/2021/09/20/northrop-grumman-now-has-five-b-21-stealth-bombers-in-production/