Indianapolis ? A federal judge on Friday denied a request from environmentalists that he block truck shipments of more than a million gallons of nerve agent waste from western Indiana to an incinerator in Texas.

Environmental groups failed to make their case that the Army did not fully consider the risks involved in moving the neutralized VX nerve agent waste across some 900 miles of highways in the nation’s midsection, U.S. District Judge Larry McKinney wrote.

He also ruled the Army had considered the scientific evidence before concluding that the deadly VX stored at the Newport Chemical Depot would not re-form into a waste called hydrolysate, the byproduct of neutralization.

VX is a Cold War-era chemical weapon so dangerous a tiny droplet can kill a human.