MELBOURNE, AUSTRALIA - FEBRUARY 27:  A Royal Australian Air Force F/A-18 Hornet about to connect to the fuel line from a KC-30A Multi Role Tanker Transport aircraft during the Australian Defence Force Air-To-Air refuelling on February 27, 2013 in Melbourne, Australia.The Australian Federal Government is planning to replace the ageing F/A-18 and already retired F-111 bomber with a fleet of 100 F-35 Lightning ll, at a cost of AUD$16 billion, with the first of the jets to be delivered to the Royal Australian Air Force at the end of 2014. (Photo by Michael Dodge/Getty Images)