The General Dynamics F-111 "Aardvark", we in Australia affectionally call it "The Pig", is a medium-range interdictor and tactical strike aircraft that also fills the roles of strategic bomber, reconnaissance, and electronic warfare in its various versions. Developed in the 1960s and first entering service in 1967, the United States Air Force (USAF) variants were officially retired by 1998. The Royal Australian Air Force (RAAF) is the sole remaining operator of the F-111.