Fighters of the 'Islamic State of Iraq and Greater Syria' parading through the Syrian town of Tel Abyad, last Thursday. The next day ISIS fighters were surprised by a concerted attack by other Syrian rebel groups. Dozens were killed.

Fighters of the Islamic State of Iraq and Greater Syria, or ISIS, parading through the Syrian town of Tel Abyad, last Thursday. The next day ISIS fighters were surprised by a concerted attack by other Syrian rebel groups. Dozens were killed.

Credit:

REUTERS/Yaser Al-Khodor

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