K-13 (missile)
The K-13 (NATO reporting name AA-2 Atoll) is a short-range, infrared homing air-to-air missile developed by the Soviet Union. It is similar in appearance and function to the American AIM-9 Sidewinder from which it was reverse-engineered. Although it since has been replaced by more modern missiles in front line service, it saw widespread service in many nations.
Background - the Sidewinder missile
During the Second Taiwan Strait Crisis in 1958, the Republic of China's (Taiwan) F-86 Sabres faced the much higher performance, mainland Chinese PLAAF MiG-17s. The MiGs had speed, maneuverability and altitude advantages over the Sabres, allowing them to engage only when they desired, normally at advantageous times. In response, the US Navy rushed to modify 100 of the ROC's Sabres to fit the newly introduced AIM-9 Sidewinder missile, the latest model being the "B" version. These were introduced into combat for the first time on 24 September 1958, when a group of MiG-17s cruised past a flight of Sabres, only to find themselves under attack by missile fire. This was the first instance of guided missiles being used in air-to-air combat.