"Crimean parliament seizure inflames Russian-Ukrainian tensions – live
Gunmen hoist Russian flag and sign saying ‘Crimea is Russia’
White House warns Russia to respect Ukrainian sovereignty
Russia downplays planned military exercises as ‘routine’
Yanukovych, still claiming presidency, to appear in Russia"
Russia, historically, has had a deep yearning and need for a warm weather port since Peter the Great (200 years). A warm weather port is one that does not freeze over in the winter. Veterans of the Second World War have told of the horrors of making the convoy runs to Murmansk across the frozen North Atlantic. Note that the Russian Black Sea Fleet
Russian geo-politics and the need for warm weather port is why Putin has been meddling in Syria; that port is Tartarus.