Yemeni soldiers stand guard on the rooftop of a state security court during a trial of suspected al Qaeda militants in Sanaa, Yemen, on Monday, Jan. 21, 2013. A Yemen security official said an explosion Sunday in the province of Bayda had killed at least 13 suspected al Qaeda militants. (AP Photo/Hani Mohammed)

Photo by: Hani Mohammed

Yemeni soldiers stand guard on the rooftop of a state security court during a trial of suspected al Qaeda militants in Sanaa, Yemen, on Monday, Jan. 21, 2013. A Yemen security official said an explosion Sunday in the province of Bayda had killed at least 13 suspected al Qaeda militants. (AP Photo/Hani Mohammed)