U.S. Department of Justice Blocks Pollution Lawsuit Against xAI: Shutting Down Colossus 2 Data Center Will Threaten U.S. Military AI Combat Capabilities

U.S. Department of Justice (DOJ) intervenes this week in the NAACP's environmental lawsuit against xAI Colossus 2 data center, seeking to dismiss the air pollution violation charges filed by NAACP. The DOJ cites national security reasons, claiming the Grok model is executing missions on military confidential networks, including military operations against Iran.
(Background: ChatGPT market share drops below 50% for the first time! Gemini approaches, Claude leads in paid usage)
(Additional context: Cybersecurity experts: AI models as dangerous as Claude Mythos are unstoppable, will be everywhere within 24 months)

Table of Contents

Toggle

• 57 turbines and a $20 billion gamble
• The logic of the national security card
• Externalities of computing power: who bears the cost of expansion

Elon Musk's xAI company’s Colossus 2 data center in Mississippi faces an NAACP lawsuit for operating 57 gas turbines without air emission permits.

But during court proceedings, the DOJ unexpectedly intervened on the 15th of this week, applying for a dismissal on the grounds of "national security." The reason given is that shutting down these turbines would threaten U.S. military AI operational capabilities.

57 turbines and a $20 billion gamble

Colossus 2 is located in Southaven, Mississippi, adjacent to Memphis, Tennessee. It is a massive data center built by xAI with an investment of $20 billion. xAI also has a first Colossus in southwest Memphis. Both sites share characteristics of abundant power, low land costs, and proximity to railway infrastructure.

The issue surfaced in April 2026. NAACP filed a lawsuit accusing xAI of starting 27 gas turbines at Colossus 2 without obtaining the necessary air pollution permits.

By mid-May, the number of unpermitted turbines had grown to 57, and NAACP immediately sought a preliminary injunction to force the shutdown. A preliminary injunction is an emergency order that temporarily restrains a defendant from certain actions before a final judgment is made.

Memphis is not a place where pollution can be taken lightly. According to 2024 statistics, Memphis ranks second among U.S. cities for emergency room visits due to asthma. NAACP’s filings explicitly state that turbine emissions directly exacerbate respiratory and cardiovascular risks in the local community.

The logic of the national security card

The DOJ’s core arguments are twofold.

First, that forcing a shutdown would "threaten U.S. national security, economic security, and energy security."

Second, Cameron Stanley, the Pentagon’s Chief Data and AI Officer (CDAO), stated in an affidavit that the military relies on "Grok’s Gov model to support critical national security missions," and that this model "has been used in recent military strikes against Iran." The Washington Post reports that the DOJ’s motion links the turbines’ power supply to national security interests, "including war against Iran."

The statement further notes that only four AI models are currently authorized to operate on classified (Secret) and top-secret (Top-Secret) networks, with Grok being one of them. Deputy Attorney General Stanley Woodward put it more directly:

"The ultimate responsibility for enforcing federal law lies with the executive branch, not private interest groups."

Externalities of computing power: who bears the cost of expansion

NAACP’s Abre’ Conner responded cautiously but firmly: "This should not be a matter of debate; NAACP will continue to defend democracy." Environmental advocate Laura Thoms criticized the DOJ’s intervention as a "desperate attempt to protect wealthy tech companies from legal accountability."

Legally, the difficulty in this case lies in a structural conflict: the Clean Air Act is a federal law enacted by Congress with clear enforcement mechanisms; yet the executive branch now claims that national security interests can override the enforcement of this law through civil litigation. While this argument is not new, using it to shield a private AI company from environmental lawsuits is unusual.

The AI computing race is systematically externalizing enormous environmental costs and legal gray areas—local communities bear the air quality burden, regulatory loopholes allow for expansion, and national security frameworks provide political cover. The lawsuit is not over yet. But the DOJ’s move signals that, in the logic of AI infrastructure expansion, environmental regulations can be deprioritized or re-ordered.