[A.A. Cunningham]

Tri-service aircraft = FAIL.

History contradicts your inept assertion.

[rmlew]

The F4 Phantom II became a tri-service aircraft due to its performance. It was designed solely as a navy interceptor.

[ASOC]

You are entitled to your opinion Your own "facts" you are not. The McDonnell Douglas F-4 Phantom II is a tandem two-seat, twin-engined, all-weather, long-range supersonic jet interceptor fighter/fighter-bomber originally developed for the United States Navy by McDonnell Aircraft. It first entered service in 1960 with the U.S. Navy. Proving highly adaptable, it was also adopted by the U.S. Marine Corps and the U.S. Air Force, and by the mid-1960s had became a major part of their respective air wings. MD actually funded most of the original work. Tri-service A/C - 'developed' as a tri-service A.C - like the F-111, V-22 Osprey and the soon to be ill-fated F35 have proven to be very costly and many cases, failures. Enjoy your day.