It follows an ISIS affiliate in Egypt claiming responsibility for bringing down the Russian plane over Sinai killing 224 people.
Key terrorist group buildings destroyed in the latest round of airstrikes in Syria include one holding missiles.
Kremlin defence spokesman Igor Konashenkov said: "Over the last three days, Russian jets made 137 sorties in the Syrian Arab Republic and destroyed 448 facilities of terrorist infrastructure in the provinces of Aleppo, Damascus, Idlib, Latakia, Raqqa, Hama and Homs."http://www.express.co.uk/news/world/618236/Russia-ISIS-Syria-bomb-448-targets-three-days
"Before you embark on a Journey of Revenge, Dig Two Graves" Confucius (504 bc)
“The darkest places in hell are reserved for those who maintain their neutrality in times of moral crisis.”
"If angry, count to ten. This will give you time to find a weapon." - Will Spencer