2015 Russian Sukhoi Su-24 shootdown

On 24 November 2015, a Turkish Air Force F-16 fighter jet shot down a Russian Sukhoi Su-24M attack aircraft near the Syria–Turkey border. According to Turkey, the aircraft was fired upon while in Turkish airspace because it violated the border up to a depth of 2.19 kilometres (1.36 miles) for about 17 seconds after being warned to change its heading ten times over a period of five minutes before entering the airspace.

Source: Wikipedia — 2015 Russian Sukhoi Su-24 shootdown (CC BY-SA 4.0)