What prompts this column is an e-mail I received last week from a retired USNR commander and former TWA pilot, with whom I had had no prior contact. He recounted a conversation that he had shortly after the mid-air destruction of TWA Flight 800 on July 17, 1996, off the coast of Long Island. He had a particular interest in the plane's demise for two reasons. One is that he was a qualified accident investigator. The second is that he had flown that very same flight a week earlier. "It had to be a bloody missile, probably an un-armed Tomahawk,...