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Russia blasted the Islamic State's declared capital in Raqqa, Syria, early Tuesday morning after publicly confirming that a homemade bomb took down its airliner over Egypt.

The Russian strikes come days after the French also stepped up their air campaign against the Islamic State in Raqqa after a string of six attacks, while President Obama has said the U.S. strategy does not need a revision.

A U.S. defense official said the Russians notified the U.S. before conduct its bombing runs, according to the safety protocols the two countries agreed to last month.

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