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Boeing throws in the towel on secret spaceplane project for military

Boeing's reusable space plane would launch like a rocket and land on a runway. Credit: Boeing

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The Phantom Express is no more.

Boeing decided to halt the development of the experimental spaceplane it was building as part of the Defense Advanced Research Projects Agency (DARPA) XS-1 program.

It’s unclear exactly why Boeing is dropping out of the program. However, the company issued a statement saying it would be redirecting its investment from the program to other areas.

Boeing’s XS-1 spaceplane is powered by one AR-22 engine. Credit: Boeing

“We will now redirect our investment from XSP to other Boeing programs that span the sea, air and space domains,” Boeing said. “We’re proud to have been part of a DARPA-led industry team that collaborated to advance launch-on-demand technology. We will make it a priority to harvest the significant learnings from this effort and apply them as Boeing continues to seek ways to provide future responsive, reusable access to space.”

The company was selected in May 2017 by DARPA, beating out Masten Space Systems and Northrop Grumman for an award totaling $146 million award to design and build an aircraft-like launch system, to launch both military and commercial payloads.

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All three companies received phase 1 funding, but only Boeing was selected for phase 2 and 3 of the program. (Phase 2 would have covered the development of the vehicle and the phase 3 contract would have called for up to 15 flights of the vehicle.)

The program was designed to increase the nation’s access to space. DARPA envisioned a reusable spaceplane that would loft hefty payloads rapidly, and at a lower cost — less than $5 million a flight.

“In its pursuit of aircraft-like operability, reliability, and cost-efficiency, DARPA and Boeing are planning to conduct a flight test demonstration of Experimental Spaceplane technology, flying 10 times in 10 days, with an additional final flight carrying the upper-stage payload delivery system,” DARPA said in the program’s mission description.

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The major goal of the project is to reuse the spacecraft frequently, with a proposed launch rate of 10 one-day missions in just 10 days. Test flights were scheduled to begin in 2020; however, with Boeing dropping out, the program is now defunct.

The XS-1 would measure 98 feet (30 meters) in length, with a 62-foot-long (19-meter) wingspan. It would fly suborbital trajectories at speeds faster than Mach 10 (10 times the speed of sound), and be capable of depositing small satellites — weighing between 3,000 and 5,000 lbs. (1,360 to 2,267 kilograms) — into orbit.

“The XS-1 would be neither a traditional airplane nor a conventional launch vehicle but rather a combination of the two, with the goal of lowering launch costs by a factor of ten and replacing today’s frustratingly long wait time with launch on demand,” Jess Sponable, DARPA program manager said in a news statement.

An artist’s impression of X-37B in orbit. (Adrian Mann)

Boeing’s Phantom Works division — which built the U.S. Air Force’s two robotic X-37B space planes — was to design, build and test the vehicle.

Dubbed the Phantom Express by Boeing, the suborbital launcher would takeoff vertically, propelled by one Aerojet Rocketdyne AR-22 engine, which was a variant of the space shuttle’s main engine. It would have an expendable upper stage that would separate from the plane before ultimately depositing the payload into orbit.

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After upper stage separation, the Phantom Express would glide back to Earth, landing on a runway just like the shuttle did and like the X-37B does now.

Boeing’s X-37B spaceplane lands on a runway, just like the proposed Phantom Express would. Credit: Boeing

“Demonstration of aircraft-like, on-demand, and routine access to space is important for meeting critical Defense Department needs and could help open the door to a range of next-generation commercial opportunities,” Brad Tousley, director of DARPA’s Tactical Technology Office (TTO), which oversees XS-1, said in a news release shortly after Boeing’s selection.

With a burgeoning commercial market opening up in low-Earth orbit, it’s entirely possible that the military’s high-tech agency may still pursue the program in some other fashion, but for now, we bid adieu to the XS-1.

I write about space, science, and future tech.

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Elon Musk: Tesla could be first to build AGI in humanoid form

Musk’s statement was shared in a post on social media platform X.  

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Credit: Tesla

Elon Musk predicted that Tesla could become one of the developers of Artificial General Intelligence (AGI) in humanoid form. Musk’s statement was shared in a post on social media platform X.  

In his post, Musk stated that “Tesla will be one of the companies to make AGI and probably the first to make it in humanoid/atom-shaping form.”

The comment comes as Tesla expands development of its Optimus humanoid robot.

During Tesla’s Q4 earnings report, Elon Musk stated that production of the Model S and Model X would be phased out at its Fremont, California, facility. The vehicles’ production line will then be converted to a pilot line for Optimus. Tesla is looking to produce 1 million units of the humanoid robots annually to start.

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Musk has previously stated that Optimus could eventually function as a von Neumann probe. The concept, proposed by mathematician John von Neumann, describes a machine capable of replicating itself using planetary resources and sending those replicas to other worlds.

Optimus would likely only be able to achieve this potential if it manages to achieve Artificial General Intelligence.

Other leaders in the AI sector have also expressed strong expectations about AGI’s potential. Demis Hassabis, CEO of Google DeepMind, recently spoke about the technology at the India AI Impact Summit 2026, as noted in a Benzinga report.

“It’s going to be something like ten times the impact of the Industrial Revolution, but happening at ten times the speed,” Hassabis said.

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Elon Musk’s recent comments about Tesla producing a product with AGI could hint at further collaboration among his companies. So far, Tesla is actively pursuing autonomous driving, but it is xAI that is pursuing AGI with its Grok program.

Considering that Elon Musk mentioned a Tesla humanoid product with AGI, it appears that an Optimus robot running xAI’s AI models could become a reality.

xAI had recently merged with SpaceX, though reports suggest that Elon Musk is also considering an even bigger merger for all his companies, including Tesla.

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Tesla influencers argue company’s polarizing Full Self-Driving transfer decision

Tesla maintains it will honor transfers for orders with initial delivery windows before the deadline and offers full deposit refunds otherwise, citing longstanding fine print that the program is “subject to change at any time.”

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Tesla’s decision to tighten its Full Self-Driving (FSD) transfer promotion has ignited fierce debate among owners and enthusiasts.

The company quietly updated its terms in late February 2026, changing the eligibility from “order by March 31, 2026” to “take delivery by March 31, 2026.”

What began as a flexible incentive to boost sales, allowing buyers to transfer their paid FSD (Supervised) to a new vehicle, now excludes many, particularly Cybertruck owners facing delivery delays into summer or later.

Tesla maintains it will honor transfers for orders with initial delivery windows before the deadline and offers full deposit refunds otherwise, citing longstanding fine print that the program is “subject to change at any time.”

The reversal has polarized the Tesla community, with accusations of a “bait-and-switch” clashing against defenses of corporate pragmatism. Many owners who placed orders under the original wording feel betrayed, especially as production backlogs and new unsupervised FSD rollout complicate timelines.

However, Tesla has allowed them to cancel their orders and receive a refund.

Critics of the decision argue that the change disadvantages loyal customers who helped fund FSD development, calling it poor communication and a revenue grab as Tesla pivots toward subscriptions.

Popular influencers have amplified the divide. Whole Mars Catalog struck a measured but firm tone, acknowledging the original “order by” language but emphasizing Tesla’s right to adjust terms. He has continued to defend Tesla in this particular issue:

He criticized extreme backlash as “dramatization” and “spoiled kids,” noting the unsupervised FSD era and broader sales challenges make blanket transfers financially risky. Whole Mars advocated for polite outreach to CEO Elon Musk over the issue.

In a contrasting perspective, Dirty TesLA voiced sharper frustration, posting that blocking transfers feels “crazy” and distancing himself from “people that want to worship a corporation and say they can do no wrong.” His stance resonated with owners who view the policy flip as disrespectful to early adopters.

Popular Tesla influencer Sawyer Merritt captured the frustration felt by thousands. In a widely shared thread viewed over 700,000 times, Merritt detailed how pre-change Cybertruck orders now risk losing FSD eligibility unless their initial delivery window falls before March 31.

The controversy underscores deeper tensions—between Tesla’s need for revenue discipline and owners’ expectations of goodwill. As FSD evolves toward unsupervised capability, the community remains split: some see the change as necessary business, others as a broken promise. Whether Tesla reconsiders under pressure or holds firm remains to be seen, but it does not appear they are planning to budge.

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Tesla Semi’s latest adoptee will likely encourage more of the same

Public visibility matters. When shoppers see a trusted name like Ralph’s running clean, high-tech trucks on public roads, skepticism fades. Competitors such as Albertsons, which pre-ordered Semis years ago, and other chains chasing ESG targets now have proof that electric autonomy works in real-world grocery fleets.

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Credit: X | ChargePozitive

The latest adoptee of the Tesla Semi will likely encourage more businesses in the same realm to adopt the all-electric Class 8 truck, as a new company utilizing the Semi has been spotted in Southern California.

A sleek, futuristic Tesla Semi truck branded for Ralph’s Supermarkets was spotted cruising a Los Angeles highway in a viral 13-second dashcam video posted March 2, by X user ChargePozitive.

This sighting confirms Kroger’s March 2025 partnership with Tesla to deploy up to 500 autonomous electric Semis.

While the initial announcement targeted Midwest supply chains, the California appearance under the Ralph’s banner shows the program expanding to Kroger’s West Coast operations. Ralph’s, a staple for millions of Southern California shoppers, is now hauling groceries with the Semi, which has zero tailpipe emissions and claims up to 500 miles of range per charge.

Tesla Semi pricing revealed after company uncovers trim levels

The timing could not be better for sustainable logistics. Traditional trucking accounts for a massive share of retail emissions, but Tesla’s Semi slashes fuel and maintenance costs while leveraging full autonomy to ease driver shortages and improve safety.

Tesla’s expanding Megacharger network, including new sites along major freight corridors and partnerships like the recently-announced one with Pilot Travel Centers, is removing range anxiety and making nationwide scaling realistic. There’s still a long way to go, but things are moving in the right direction.

Public visibility matters. When shoppers see a trusted name like Ralph’s running clean, high-tech trucks on public roads, skepticism fades. Competitors such as Albertsons, which pre-ordered Semis years ago, and other chains chasing ESG targets now have proof that electric autonomy works in real-world grocery fleets.

PepsiCo’s successful pilots already demonstrated viability, and Ralph’s sighting adds retail credibility.

As Tesla ramps high-volume Semi production through 2026, this isn’t an isolated curiosity. Instead, it’s a catalyst. More grocers adopting the platform will accelerate industry-wide decarbonization, cut operating expenses, and deliver tangible environmental wins.

The future of sustainable supply chains is already on the highway, and Ralph’s just made it impossible to ignore.

Moving forward, Tesla hopes to expand the Semi program into other regions, including Europe, which CEO Elon Musk recently said is a total possibility next year.

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