A <a href="https://en.wikipedia.org/wiki/Russian_Air_Force" id="mwATM" rel="mw:WikiLink" title="Russian Air Force">Russian Air Force</a> <a href="https://en.wikipedia.org/wiki/Sukhoi_Su-24" id="mwATQ" rel="mw:WikiLink" title="Sukhoi Su-24">Sukhoi Su-24</a> fighter jet is <a href="https://en.wikipedia.org/wiki/2015_Russian_Sukhoi_Su-24_shootdown" id="mwATU" rel="mw:WikiLink" title="2015 Russian Sukhoi Su-24 shootdown">shot down</a> by the <a href="https://en.wikipedia.org/wiki/Turkish_Air_Force" id="mwATY" rel="mw:WikiLink" title="Turkish Air Force">Turkish Air Force</a> over the <a href="https://en.wikipedia.org/wiki/Syria–Turkey_border" id="mwATc" rel="mw:WikiLink" title="Syria–Turkey border">Syria–Turkey border</a>, killing one of the two pilots; a Russian marine is also killed during a subsequent rescue effort.