Syrian rebels take position near Qusayr, nine miles from the flashpoint city of Homs. Syrian government forces recently conducted a massacre in the town of al-Houla, killing more than 100 civilians, many of them children.  Activists say that more than 13,000 people have been killed in the Syrian unrest, which began as a peaceful protest movement and has become gradually more violent.

STR/AFP/GettyImages

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