Click 'play' above to watch a live feed of Pope Francis' Urbi et Orbi blessing.
"Urbi et Orbi" translates as "to the city (of Rome) and to the world".
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Special forces say they have attacked a sprawling site adjacent to the city's airport in a bid to liberate the area from IS.
Commuters were also warned to expect travel chaos as Doris gathered speeds of nearly 90mph.
A man with 62 penalty points on his licence is among thousands of motorists allowed to drive despite exceeding the limit warranting a ban.