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Displaced families who fled fighting in the southern city of Aden wait for relief supplies during a food distribution effort by Yemeni volunteers, in Taiz, Yemen, Saturday, May 9, 2015. Humanitarian organizations say they face challenges delivering aid to citizens affected by the ongoing conflict, because of a severe fuel shortage and difficulty accessing warehouses. (AP Photo/Abdulnasser Alseddik)
Displaced families who fled fighting in the southern city of Aden wait for relief supplies during a food distribution effort by Yemeni volunteers, in Taiz, Yemen, Saturday, May 9, 2015. Humanitarian organizations say they face challenges delivering aid to citizens affected by the ongoing conflict, because of a severe fuel shortage and difficulty accessing warehouses. (AP Photo/Abdulnasser Alseddik)

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    Yemen war gives way to humanitarian crisis

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Yemen war gives way to humanitarian crisis

It has been two years since Yemen has been in the grip of a civil war and the conflict has given way to a dire humanitarian crisis. CNN's Nick Paton Walsh reports.

Yemen war gives way to humanitarian crisis

It has been two years since Yemen has been in the grip of a civil war and the conflict has given way to a dire humanitarian crisis. CNN's Nick Paton Walsh reports.