Why is Aleppo important to Syria rebels?

Syrian people stand next to a checkpoint manned by rebels in the northern city of Aleppo on July 24, 2012.
Syrian people stand next to a checkpoint manned by rebels in the northern city of Aleppo on July 24, 2012.

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    Why is Aleppo important to Syria rebels?

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CNN's Hala Goroni with a look at why the Syrian city of Aleppo is of strategic importance to rebels.