Russia used Iran for the first time as a base from which to launch air strikes against Syrian militants, widening its air campaign in Syria and deepening its involvement in the Middle East.
[video type='youtube' id='lRAbhH8diHU' data-height='365']
In a move underscoring Moscow's increasingly close ties with Tehran, long-range Russian Tupolev-22M3 bombers and Sukhoi-34 fighter bombers used Iran's Hamadan air base to strike a range of targets in Syria.
It was the first time Russia has used the territory of another nation, apart from Syria itself, to launch such strikes since the Kremlin launched a bombing campaign to support Syrian President Bashar al-Assad in September last year.