The US Department of Justice asked a federal court to dismiss a Clean Air Act lawsuit against xAI, arguing that shutting the company’s gas turbines would threaten national security.
The filing ties xAI’s Colossus 2 data center to active military operations. It turns a local pollution dispute into a test of how far Washington will go to shield large private AI infrastructure.
A Pollution Fight Over xAI’s Turbines
The National Association for the Advancement of Colored People (NAACP) sued xAI in April under the Clean Air Act.
The complaint says the company ran 27 gas turbines without proper permits to power its Colossus 2 data center near Memphis, Tennessee.
The turbines sit in Southaven, Mississippi, just across the state line. xAI argues the units are temporary and trailer mounted, a reading state regulators first accepted before granting a permit in March.
This is the second such fight. At the original Colossus site in South Memphis, xAI ran as many as 35 unpermitted turbines, then cut the count and licensed 15 after legal pressure in 2025.
Environmental lawyers say the Southaven plant can emit more than 1,700 tons of smog-forming nitrogen oxides a year, plus fine particulate matter and carcinogenic formaldehyde.
They warn that the burden falls on majority-Black neighborhoods already living with poor air quality, and they want the court to halt operations and impose penalties.
The National Security Argument
On Monday, the Justice Department intervened and joined xAI and the state of Mississippi in seeking dismissal. The filing says halting the turbines would threaten American national, economic, and energy security.
Cameron Stanley, the Defense Department’s chief digital and AI officer, submitted a declaration stating that the Grok AI model is one of only four cleared for Secret and Top Secret networks.
He tied it to recent US military operations, including strikes against Iran.
The move fits the Trump administration’s stated policy of sustaining American dominance in AI. Officials have pushed to speed data center buildout as power demand from large models climbs.
Critics see a risky precedent. They argue that labeling private infrastructure a national security asset could let other AI firms sidestep environmental and local rules. Supporters counter that regulatory delays would cede ground to China.
What It Means for SpaceX and SPCX Stock
The case reaches beyond xAI. SpaceX absorbed xAI in February in an all-stock deal worth about $1.25 trillion, the largest merger on record.
That folded Grok, the Colossus data centers, and the turbines into one company, making the DOJ position directly relevant to SpaceX.
Federal support reinforces its defense and AI standing weeks after a record public debut. SpaceX raised roughly $75 billion in the largest IPO ever and priced near $1.77 trillion.
The intervention could feed bullish sentiment around SPCX, which has traded sharply above its IPO open price of $150.
The risks have not vanished.
SpaceX still faces a separate nuisance suit over the same site, and the core environmental claims remain unresolved. A preliminary injunction hearing is reportedly set for August, leaving the final outcome open.
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