Not exactly an Archduke Ferdinand moment but... This was by a NATO country. Yosemite Sam accidentally laying down a powder train? It seems to be an SU-24, according to CNN.
ETA: Reports are that two ejected inside Syria. This will give the West a good view of Russian CSAR capability in an expeditionary environment.
http://www.bbc.com/news/world-middle-east-34907983
Turkey 'down Russian warplane on Syria border'
Turkish warplanes have reportedly shot down a Russian military aircraft on the border with Syria.
Russia's Interfax news agency cited the Russian defence ministry as saying that a Su-24 had crashed in northern Syria, and that its two pilots had ejected.
Turkish military officials said Turkish F-16s had shot down the plane after repeatedly warning its pilots that they were violating Turkish airspace.
Video footage showed the plane crashing into mountains in Latakia province.
Russia launched an air campaign to bolster Syrian President Bashar al-Assad's government in late September.
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It says it has targeted only "terrorists", but activists say its strikes have mainly hit Western-backed rebel groups.
Turkey, a staunch critic of Mr Assad, has warned against violations of its airspace by Russian and Syrian aircraft.
Last month, Ankara said Turkish F-16s had intercepted a Russian jet that crossed its border and two Turkish jets had been harassed by an unidentified Mig-29.