Russian airliner crashes in central Sinai

A confirmed terrorist act. Retribution imminent, says Russia.

Metrojet Crash: Traces of Explosives Found in Wreckage, Kremlin Says - NBC News

More breaking news, two airport workers arrested over the bombing of the Russian aircraft.

ISIS posts photo of the bomb that bought down the Russian plane [ supposedly]

Metrojet Crash: ISIS Publishes Photo of Purported Russian Jet Bomb - NBC News