The Grumman F-14 Tomcat is an American carrier-capable supersonic, twin-engine, two-seat, twin-tail, variable-sweep wing fighter aircraft. The Tomcat was developed for the United States Navy’s Naval Fighter Experimental program after the collapse of the F-111B project. The U.S. Navy decided to fill the role of fighter attack aircraft with the F/A-18E/F Super Hornet, and the F-14 Tomcat was finally retired on September 22, 2006. The Super Tomcat 21 instead remains one of the more fascinating examples of what could have been.