If the FBI and the CIA were involved, you can be assured the cause was NOT what they said.
In this case, the FBI was pursuing the missile theory until Bill Clinton pulled the FBI off the lead and put the CIA in charge. That's when the focus shifted to the center fuel tank explosion.
However, 10 days after the TWA 800 explosion, the Centennial Olympic Park bombing occurred, and the FBI immediately latched onto the Richard Jewell theory. It's clear from these two events that both the CIA and FBI had begun their shift in focus towards protecting Democrats.
-PJ