Fertilizer manufacturers can’t be held legally responsible for the 1993 bombing of the World Trade Center in New York City even if it could be shown that they had known for years how to make a product that wouldn’t detonate when combined with fuel oil, the 3rd U.S. Circuit Court of Appeals has ruled.

Finding that the case failed to satisfy the most fundamental principles of products liability law, the unanimous three-judge panel upheld the dismissal of a suit brought in the District of New Jersey by the Port Authority of New York and New Jersey.