As if fear, hunger, thirst, worry and exhaustion were not enough to endure, new trials emerged Thursday for those on the 1,000 mile-plus trek into Europe: torrential rains and thick mud.

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The BBC's Ian Pannell reports from the Syrian city of Aleppo where government forces have launched an all-out attack to drive rebel fighters from their strongholds.

The BBC's Ian Pannell reports from the Syrian city of Aleppo where government forces have launched an all-out attack to drive rebel fighters from their strongholds.