Because there is absolutely no evidence of a bomb in a suitcase. There is a signature to bomb damage and none has been found.
Furthermore, why is it that they called TWA#800 an accident when ALL OF THE EVIDENCE POINTS TO A MISSILE? Scores of witnesses saw a streak of light zigzag up from the horizon and strike #800. One of them was an army major helo pilot. The FBI ignored his testimony as well as the testimony of all the others. They invented their own piece of crap story that no one believes except the biased media and the gullible. Laughably, in order to explain away the upward streak of light, they said that after the nose of #800 fell off, the plane CLIMBED for 1000 feet (this explains the upward streak of light)! Anyone with any knowledge of the airplane or physics KNOWS that this is impossible.
If they covered up that time, why should I ever believe them again? This investigation already has a bad smell.