When an explosion killed almost all of its leaders in a single blow last year, many thought it was the end for Ahrar al-Sham, a powerful Syrian insurgent group founded by members loyal to al-Qaida.
But the group immediately re-emerged stronger. It replaced its leader and chose new military commanders. A few months later, it joined a coalition of insurgent groups that seized the city of Idlib with at least 2,000 fighters, making it the most influential group in the Army of Conquest, which includes al-Qaida's Syria wing, the Nusra Front.
The group now has even loftier ambitions.
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