that had been checked onto PA 103, either in London or through the Interline baggage system. Interline baggage is baggage checked onto a flight in one location and automatically routed by the airline to other locations. It is the weak link in airline security, because provided it is tagged correctly a bag not properly x-rayed by a low-risk airline in a low-risk airport may be routed without further checks through several other airports to high-risk airlines. Frankfurt International Airport records for December 21, 1988, had been saved, only by chance, by computer programmer Bogomira Erac, who had kept a copy of the records on the spur of the moment "... in memory of the people who were on the plane". These records were to show that an unaccompanied bag had been routed from Air Malta Flight KM 180 out of Luqa Airport to Frankfurt, where it had been loaded onto Pan Am 103A, the feeder flight to London. A properly marked Air Malta baggage tag would have routed the suitcase through the interline system from Malta to Frankfurt, Frankfurt to London, and London to New York City. The PA 103 investigators learned that the baggage for Air Malta Flight KM 180 was processed at the same time as the bags for Libyan Arab Airlines Flight 147 to Tripoli. They later discovered that Megrahi had been a passenger on this flight, having arrived in Malta two days earlier using a false passport. As he declined to take the stand during his trial, his explanation for his presence in Malta, and his reason for using a fake Identity card, was never heard. Once alerted by Edwin Bollier of Mebo to the Megrahi–Fhimah friendship and business relationship, Scottish police obtained permission to search Fhimah's office in Malta. There they found a diary he had kept, in which he had reminded himself, on December 15, 1988, in English, to "take taggs [sic] from Air Malta." However, Air Malta issued a statement in 1989, denying that an unaccompanied suitcase could have been carried on Flight KM 180: "39 passengers checked in 55 pieces of baggage; 55 pieces of baggage were loaded onto Flight KM 180; and, 39 passengers travelled on the flight. Air Malta has been informed that all 55 pieces of baggage have been accounted for and that every one of the 39 passengers has been identified," Air Malta declared. See also Pan Am