McDonnell Douglas Phantom II - though I worked on some of the systems in the (spy bird). Proof that with enough power, even a brick will fly. (though I've been told that the hydraulic flight control system takes some getting used too)
Best close-air ground support weapon in our arsenal. Was privileged to watch these awesome machines fly during early testing days. And go to training at Fairchild training center Long Island New York to work on them.