Alternate titles: "Flight 21 is Missing", "Inbound" and "Flight 21 Is Missing". A USAF Boeing CT-43 (operating under the call sign IF021) attempts an instrument approach into Dubrovnik Airport in heavy fog. The passengers are mainly government officials, including U.S. Government Secretaries. The pilots attempt the IFR non-precision NDB approach to Runway 12. The aircraft goes off course and hits mountains north of the airport, killing all 35 people on board, including the United States Secretary of Commerce Ron Brown.