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Armed Yemeni militiamen loyal to President Abedrabbo Mansour Hadi, also known as the Popular Resistance Committees, sit on tanks, one flying the separatist Southern Movement flag, outside the Yemeni special forces command base in the southern city of Aden on March 19, 2015.
Armed Yemeni militiamen loyal to President Abedrabbo Mansour Hadi, also known as the Popular Resistance Committees, sit on tanks, one flying the separatist Southern Movement flag, outside the Yemeni special forces command base in the southern city of Aden on March 19, 2015.

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    U.N. warns Yemen is at 'edge of civil war'

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U.N. warns Yemen is at 'edge of civil war'

Shiite Houthi rebels are now in control of international airport in the southwestern city of Taiz in Yemen. CNN's Nic Robertson reports.

U.N. warns Yemen is at 'edge of civil war'

Shiite Houthi rebels are now in control of international airport in the southwestern city of Taiz in Yemen. CNN's Nic Robertson reports.