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F-111 Aardvark

2.5 Mach

The F11 was developed by General Dynamics in the mid-60's to serve multiple roles. It was to be a bomber, reconnaissance craft, and capable of electronic warfare. The F111 introduced several firsts for a military aircraft, including variable-sweep wings and turbofan afterburners. Today, the F111 has been entirely phased out by US and British forces in favor of the F-15 Strike Eagle and F18 Super Hornet, respectively. The only remaining active-service F111's are in Australia. Unit cost: $50 Million, inflation adjusted.