The U.S. Air Force is hoping to see a second pre-production B-21 Raider stealth bomber take to the skies before the end of the year. The service also says it has conducted four more flight tests of the AGM-181A Long-Range Standoff (LRSO) cruise missile, which will be a key nuclear weapon for the B-21, so far this year.

Air Force Lt. Gen. Andrew Gebara, Deputy Chief of Staff for Strategic Deterrence and Nuclear Integration, provided updates on the B-21 program and other topics today during a virtual talk hosted by the Air & Space Forces Association’s Mitchell Institute for Aerospace Studies.

“So this is an event-based process, based on the test team, the contractor, [and] the program office. I believe it [the first flight of the second B-21] will happen by the end of the year, but we’re not going to ever give them an artificial date that they have to make if it doesn’t bring the test program along to where they need to be,” Gebara said. “We’re going to proceed as we can, efficiently, effectively, and with a sense of urgency, but we’re also going to be event-based.

“That’s really been the secret sauce to the B-21 right now, is no undue pressures. Let them do what they’re doing, and they’ll get us the world’s best aircraft here,” Gebara added.

In July, Air Force Gen. Thomas Bussiere, head of Air Force Global Strike Command (AFGSC), had told Air & Space Forces Magazine that the second B-21 could take to the skies “shortly.” The service had previously told that outlet that its goal was for two B-21s to be flying in 2026.

The first of six pre-production B-21s made its maiden flight in November 2023. As of September 2024, the bomber was said to be flying around two sorties every week from Edwards Air Force Base in California in support of ongoing testing.

The B-21’s manufacturer, Northrop Grumman, has also delivered two non-flying airframes to help with the test campaign. As of January, Northrop Grumman had received two contracts for low-rate initial production of additional B-21s, as well.

“The B-21 [program] is producing, its results-oriented in flight tests, basically on time, [and] basically on budget,” Gen. Gebara added in his remarks today.

U.S. military officials and members of Congress have described the Raider as a model acquisition program for years now. The Air Force’s goal is to begin flying B-21s operationally before the end of the decade.

When asked today about the expected size of the B-21 fleet, Gen. Gebara said that work is still ongoing to reach a firm number. The Air Force’s stated plan now is to acquire at least 100 Raiders, but that figure is widely expected to grow. Congress notably included $4.5 billion in funding to help accelerate B-21 production in a reconciliation funding bill, also known as the One Big Beautiful Bill Act, signed into law in July. The Pentagon is asking for billions more to support the Raider program in its 2026 Fiscal Year budget request.

“I think the work you’ve seen from the Congress to get us those additional funding [sic] tells me a couple things that are very important. One is, it’s going to go a long ways to be able to help us facilitize and get to the point where we can build this thing at scale,” Gebara said. “I think the other piece to it, though, is it’s an absolute show of confidence by the Congress that we’re on the right track on this program. We’ve done a lot of work to hold changes to the minimum, to allow the program office and the contractor to get after it, and it’s paying dividends.”

The final B-21 fleet “numbers will absolutely be reliant on the work STRATCOM [U.S. Strategic Command] is doing, on what is sufficient,” Gebara added. “But it’s important to remember this is also the backbone of our conventional force. And so we aren’t building out B-21 numbers only for our [nuclear] triad. We’re also building it out for our long-range [conventional] strike capability. And so all that will that will go into it.”

Gebara’s latter points here are directly in line with comments from Air Force Maj. Gen. Jason Armagost at a separate Mitchell Institute virtual talk earlier this month. Armagost, who is commander of the Eighth Air Force, which oversees all of the Air Force’s current bomber fleets, spoke at length about the new operational possibilities that will come from having a substantial number of B-21s, particularly in light of the ‘silver bullet’ nature of the current B-2 force. The Air Force has just 19 B-2s, not all of which are ever available for taskings, conventional or nuclear, at any one time. This inherently imposes limitations, which the B-21 is not expected to be burdened with, despite being a smaller aircraft with less ordnance capacity per bomber, as you can read more about in detail here.

“Our bomber force right now is optimized for raids and small-scale, a few nights at a time [type operations],” Gen. Gebra said today, something that was highlighted by the Operation Midnight Hammer strikes on nuclear sites in Iran in June. “There’s no guarantee that’ll be the case in the future.”

All this being said, the B-21 will still have a critical nuclear deterrent role, including as a launch platform for the stealthy AGM-181 LRSO cruise missile. The LRSO is also set to be part of the future arsenal for the Air Force’s B-52 bombers, which are being deeply upgraded, overall, as you can learn more about here.

“Our LRSO missile, which will go on our bomber force, has had four successful flight tests in 2025 alone,” Gebera said during today’s talk. “Based on time, based on budget, it’s going very well.”

Flight testing of the LRSO has already been underway for years. However, other details about the highly classified missile, which Raytheon is been developing, remain limited. The Air Force released the first-ever public rendering of the missile, seen below, in June. You can find TWZ‘s previous analysis of that image, which may not necessarily reflect the current design, here.

The B-21 and LRSO are also both part of a larger Long-Range Strike (LRS) family of systems, much of which remains in the classified realm, as TWZ has explored in the past.

By all indications, the B-21 program continues to make steady progress, with a second Raider set to take to the skies sometime in the coming weeks or months.

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