The North American P-51 Mustang is viewed as one of the iconic American fighters of the Second World War. Designed to fulfil an RAF specification, the Mustang was transformed once the Rolls Royce Merlin engine was installed. The P-51D model's long range and excellent firepower made it a superb escort fighter, able to protect the bombers all the way to Berlin and back. The P-51 is recorded as being the top scoring Allied fighter of the war with 4,950 enemy aircraft destroyed. After the war the P-51D saw service in Korea and was used by some South American country's air arms until the early 1980s.