Watching this on TV.

 The indictment says that on the morning of the 21 December, 1988, the two men placed aboard Air Malta Flight 180, from Malta to Frankfurt, a brown Samsonite suitcase containing the bomb that ultimately blew up Pan Am 103. The prosecution will argue that the deadly suitcase was then transferred as unaccompanied baggage, first to Pan Am Flight 103A at Frankfurt, then to Flight 103 at London, before blowing up over Lockerbie.

Some terrorism experts argue that that scenario is implausible on its face. One such skeptic is Noel Koch, who headed the US Defense Department's anti-terrorism efforts from 1981 to 1986. Sophisticated Middle East terrorists who wanted to blow up a plane over the North Atlantic, Koch insists, would not plant their bomb nearly a thousand miles away and rely on two successful luggage transfers by airline workers.