VIRGIN BLUE PLANE PASSES CONTROL TOWER AT SYDNEY AIRPORT, 2003-08-01 (photo)

A Qantas passenger jet passes the control tower at Sydney airport August 1, 2003. Aviation security is again under the spotlight in Australia after a passenger was detained on Friday for carrying an expandable metal baton and a knife on a domestic flight into Sydney. The incident, in which no threats were made, came after the United States warned that the radical Islamic group al Qaeda may be planning another September 11-style attack involving hijacked airliners, and named Australia as one place where such an attack could originate. REUTERS/Will Burgess WB/FA