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In this image taken from social media, an ISIS fighter holds the group's flag as he stands on a tank, purportedly captured when they took over the town of Qaryatain, Syria.
In this image taken from social media, an ISIS fighter holds the group's flag as he stands on a tank, purportedly captured when they took over the town of Qaryatain, Syria.

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    Where are Arab nations in fight against ISIS?

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Where are Arab nations in fight against ISIS?

Many observers say the absence of key Arab nations in the fight against ISIS is baffling. CNN's Becky Anderson reports.

Where are Arab nations in fight against ISIS?

Many observers say the absence of key Arab nations in the fight against ISIS is baffling. CNN's Becky Anderson reports.