A terror group from Egypt told the FBI it was responsible for downing TWA Flight 800 and killing all 230 people aboard, according to newly surfaced FBI records featured in a new documentary marking the 30th anniversary of the tragedy. An explosive claim buried in a trove of newly obtained Freedom of Information Act documents is reviving decades-old questions about whether a missile or bomb brought down the Boeing 747-100 off Long Island on July 17, 1996. Among the records obtained by the transparency nonprofit Judicial Watch is a New York teletype dated two days after the crash, case file...