News
United Launch Alliance’s Delta IV Heavy readies for final flight
United Launch Alliance’s Delta IV Heavy is currently scheduled to make its final flight on Thursday, March 28th, from Space Launch Complex 37B at Cape Canaveral Space Force Station in Florida.
This final flight will conclude just over three decades of missions for the Delta IV family of launch vehicles, which primarily sent classified payloads for the United States government into various orbits from its launch pads in Florida and California.
Like most of its previous missions, this mission will send a classified payload to orbit for the National Reconnaissance Office.
The dependable Delta — one of the pillars in American rocketry for 60+ years — is preparing for its final mission that will carry a national security payload to serve and protect the U.S. and our allies.
#DeltaIVHeavy #NROL70 preview: https://t.co/7HC1Opbp20#TheDeltaFinale pic.twitter.com/43fvzKPxz4— ULA (@ulalaunch) March 12, 2024
The Delta IV Heavy consists of three Delta rockets strapped together, each powered by a single Aerojet Rocketdyne RS-68A engine, which uses liquid hydrogen and liquid oxygen. The heavy variant of the rocket flew 16 times, including the first Orion capsule test flight. The Delta IV family has launched three variants: the Delta IV Medium, Delta IV Medium+, and Delta IV Heavy.
The Delta IV consisted of just a single common core booster that flew just three times. The Delta IV Medium+ added to its thrust capabilities by strapping on anywhere between two and four solid rocket boosters. The Medium+ variant took its final flight in August 2019, launching a GPS satellite for the U.S. Air Force after a total of 29 launches.
Delta IV Medium on its final flight (Credit Richard Angle)
The rocket was designed to be part of the U.S. Air Force’s Evolved Expendable Launch Vehicle program and didn’t see any real competition for contracts until SpaceX qualified the Falcon 9 and Falcon Heavy, which was able to compete for contracts at a much lower cost. This ultimately led to the retirement of the Delta IV and the introduction of the Vulcan rocket, which is much cheaper and can fly in many configurations to fit mission requirements.
This final launch of the Delta IV Heavy will mark the end of an era for United Launch Alliance as it transitions to the much more versatile Vulcan rocket and rumors of its eventual sale, potentially to Jeff Bezos’s Blue Origin launch company, which is gearing up for the maiden launch of its own giant rocket, New Glenn.
Questions or comments? Shoot me an email at rangle@teslarati.com, or Tweet me @RDAnglePhoto.
News
Tesla Sweden’s port deal sparks political clash in Trelleborg
The extension of Tesla’s lease has drawn criticism from the local Social Democratic opposition.
Tesla Sweden’s lease agreement at the Port of Trelleborg has triggered a political dispute, with local leaders divided over whether the municipally owned port should continue renting space to the electric vehicle maker amidst its ongoing conflict with the IF Metall union.
Tesla Sweden’s recently extended contract with the Port of Trelleborg has triggered calls for greater political oversight of future agreements.
Tesla has used the Port of Trelleborg to import vehicles into Sweden amid a blockade by the Transport Workers’ Union, as noted in a report from Dagens Arbete (DA). By routing cars via trucks on passenger ferries, the company has maintained deliveries despite the labor dispute. Vehicles have also been stored and prepared in facilities leased from the municipal port company.
The extension of Tesla’s lease has drawn criticism from the local Social Democratic opposition. Initially, the Port of Trelleborg hinted that it would not enter into new agreements with Tesla, but it eventually opted to renew its existing contract with the EV maker anyway.
Lennart Höckert, an opposition councilor, described the port’s decision as a “betrayal of the Swedish model,” arguing that a municipally owned entity should not appear to side with one party in an active labor dispute.
“If you want to protect the Swedish model, you shouldn’t get involved in a conflict and help one of the parties. When you as a company do this, it means that you are actually taking a position and making things worse in an already ongoing conflict,” Höckert said.
He added that the party now wants politicians to review and approve future rental agreements involving municipal properties at the port.
The proposal has been sharply criticized by Mathias Andersson of the Sweden Democrats, who chairs the municipal board. In comments to local media, Andersson described the Social Democrats’ approach as “Kim Jong Un-style,” arguing that political leaders should not micromanage a company governed by its own board.
“I believe that the port should be run like any other business,” Andersson said. He also noted that operational decisions fall under the authority of the Port of Trelleborg’s board instead of elected officials.
Elon Musk
Elon Musk’s X sees outage on Monday as users report issues
Monday’s outage follows a similar issue that befell the social media platform in mid-January.
X experienced an outage on Monday morning, with tens of thousands of users reporting that the platform failed to load across both desktop and mobile. The disruption began around 8:02 a.m. ET, as per Downdetector data, and quickly escalated in the U.S. and U.K.
Monday’s outage follows a similar issue that befell the social media platform in mid-January.
Shortly after 8 a.m. ET, Downdetector showed a sharp rise in incident reports. At one point, U.S. complaints exceeded 40,000, while U.K. reports climbed past 6,000. Earlier in the outage, filings had already crossed 11,000 in the U.S. and 3,300 in the U.K., as noted in a TechRadar report. X users in other locations, such as the Philippines and Costa Rica, also reported similar issues.
Users attempting to access X were met with a “something went wrong” message. Feeds did not refresh, posts failed to appear, and both the social media platform’s app and web versions appeared affected by the issue. The outage struck during peak weekday usage, amplifying its visibility across regions worldwide.
X has not issued an official explanation for the latest outage or confirmed what caused the service disruption. The scale of complaints drew comparisons to the platform’s major outage in November 2025, which resulted in users being met with “Internal server error / Error code 500” messages, as well as Cloudflare-related error notices.
The incident also comes just weeks after X experienced a similar downtime in mid-January. That outage seemed more notable, however, with more than 100,000 users reporting issues with the social media platform on Downdetector.
Elon Musk
New details emerge on The Boring Company’s Universal tunnel plans
The materials outline staffing, construction timelines, tunnel configuration, and operational details that were not previously public.
Newly released bidding documents have shed light on how Elon Musk’s Boring Company plans to connect Universal Orlando Resort’s north campus to Universal Epic Universe.
The materials outline staffing, construction timelines, tunnel configuration, and operational details that were not previously public about the planned Loop system.
The Shingle Creek Transit & Utility Community Development District voted Feb. 11 to begin contract negotiations with The Boring Company after ranking it the top bidder for the Universal Orlando transport project. Now, evaluation documents obtained by local news media reveal how the company intends to execute the project, according to Attraction Insight.
The proposal describes a twin-tunnel configuration, with one tunnel in each direction. It also noted that permitting, design, and construction could take roughly a year and a half once approvals are secured. The company indicated it could deploy multiple tunnel boring machines and install temporary support infrastructure, including muck storage pits and stormwater systems, during construction.
Bid documents list eight internal specialists assigned to the project, including tunnel engineers, structural engineers, and tunnel boring machine experts. Six subcontractors would handle fire protection, communications, soil treatment, and concrete work.
The company stated it “has the necessary internally produced tunneling equipment and personnel immediately available to complete this project for the district as quickly as permits and approvals can be obtained.”
Operationally, the system would mirror the company’s Las Vegas Loop model, using Tesla vehicles to provide point-to-point transport rather than fixed-route buses. The proposal frames the concept as “on-demand, express transportation,” with vehicles dispatched as needed and capacity adjustable in real time.
Stations could be built underground or above ground with ramp access into tunnels. The documents also referenced potential future integration of a configurable Robovan for passengers and cargo, though capacity projections for the Orlando tunnels have not yet been disclosed.
The proposal states that the Loop can integrate “easily into environmentally sensitive areas,” but it does not provide detailed mitigation plans for Central Florida’s high water table and limestone geology, which is susceptible to sinkholes. The company has stated that it intends to hire an Orlando-based geotechnical firm to evaluate soil conditions.
Tesla Sweden’s port deal sparks political clash in Trelleborg
Elon Musk’s X sees outage on Monday as users report issues
