The U.S. defense department took a chemical (aka Agent Orange) that had been used safely for clearing brush from ditches for decades and started spraying it from helicopters without any research being done on its safety.

Sure Dow and Monsanto took the money. But they learned their lesson and when the DEA started spraying Paraquat onto cocaine plants in South America Dow sued them to stop. I believe they even threatened to take Paraquat off the market if they lost their lawsuit.