Aleppo hit by worst strikes for months as Putin, Assad ignore U.S. plea

By Tom Perry and Ellen Francis BEIRUT (Reuters) - Warplanes mounted the heaviest air strikes in months against rebel-held districts of the city of Aleppo overnight, as Russia and the Syrian government spurned a U.S. plea to halt flights, burying any hope for the revival of a doomed ceasefire. "It's as if the planes are trying to compensate for all the days they didn't drop bombs" during the ceasefire, Ammar al-Selmo, the head of the civil defence rescue service in opposition-held eastern Aleppo