   FBI looks clueless as bomb investigations get nowhere  The
failure to deliver a happy outcome has dismayed the US, writes
John Carlin The lesson of the FBI investigations into the
explosion of TWA flight 800 and the bomb at the Olympic Games
has subversive connotations for a people educated in the
proposition that life imitates the movies.  The FBI, repository
of many of the celluloid myths that shape the American mind, has
betrayed an all-too-human fallibility in its efforts to track
down those responsible for what appear, in the light of the
evidence unfolding inch by inch in the TWA case, to have been
the year's two big terrorist outrages. And, as if that were not
humbling enough, the indications are that the Untouchables' case
against the two men accused of last year's bombing in Oklahoma
City - the worst crime ever committed on American soil - may not
be as open-and-shut as it once seemed.  Each of the three
incidents has received the full infotainment treatment from
American TV. Each has been portray