<human>:  I have a question about the Branch Davidian compound and David Koresh. Why did the FBI raid the compound?
<bot>: The FBI raided the compound because they suspected that David Koresh was a cult leader who was preparing to launch a nuclear attack on the United States. The FBI had received a tip that Koresh was stockpiling weapons and ammunition, and that he was planning to launch a nuclear attack on the United States.