A Yemeni soldier searches cars at a checkpoint in Sanaa, Yemen, on March 27, 2014. The Yemeni government deployed more soldiers in major cities in the country after a series of attacks against government and foreigners. Two staff members of the United Nations were released after they were abducted in Sanaa on Tuesday. (Xinhua/Mohammed Mohammed)
Yemeni soldiers search cars at a checkpoint in Sanaa, Yemen, on March 27, 2014. The Yemeni government deployed more soldiers in major cities in the country after a series of attacks against government and foreigners. Two staff members of the United Nations were released after they were abducted in Sanaa on Tuesday. (Xinhua/Mohammed Mohammed)
A Yemeni soldier searches cars at a checkpoint in Sanaa, Yemen, on March 27, 2014. The Yemeni government deployed more soldiers in major cities in the country after a series of attacks against government and foreigners. Two staff members of the United Nations were released after they were abducted in Sanaa on Tuesday. (Xinhua/Mohammed Mohammed)
Yemeni soldiers search cars at a checkpoint in Sanaa, Yemen, on March 27, 2014. The Yemeni government deployed more soldiers in major cities in the country after a series of attacks against government and foreigners. Two staff members of the United Nations were released after they were abducted in Sanaa on Tuesday. (Xinhua/Mohammed Mohammed)
