The U.S. Department of Justice (DOJ) filed a brief on Monday supporting xAI in a lawsuit brought by the NAACP challenging 57 natural gas turbines operating without air permits at xAI’s Colossus data centers near Memphis.
DOJ’s rationale
The DOJ argued that shutting down the turbines would harm "national, economic, and energy security." In its filing the department noted that xAI’s Grok is among four AI models it identifies as supporting military operations, and the memo referenced the use of such models in recent strikes in Iran.
xAI’s "mobile" turbine argument
xAI has characterized the trailer-mounted turbines as "mobile" equipment; the company asserts this status exempts them from conventional air-permitting requirements. The NAACP’s lawsuit seeks to stop the turbines specifically because they lack those permits.
Financial and industry context
Beyond environmental permitting, the dispute highlights competition over securing large-scale power capacity and legal protections for AI infrastructure. SpaceX’s IPO filing is also cited as allocating an additional $2.8 billion for turbines.
Why this matters
The case underscores that competition in the AI sector increasingly involves access to megawatts, logistics and legal strategy as much as algorithms. The DOJ’s intervention shows the federal government may invoke national-security and energy-security rationales to support companies’ energy installations.
Next steps
The legal outcome will depend on further filings and a judge’s ruling. The court’s decision could affect how regulatory agencies treat similarly described "mobile" turbine units in future environmental permitting, and how readily companies can invoke national-security arguments to shield infrastructure investments.
