Yemeni soldiers stand guard in front of Yemen's President Abed Rabbu Mansour Hadi's house as protestors demonstrate to denounce terror attacks and hail the decisions by Hadi to replace security officials in Sanaa, Yemen, Wednesday, Sept. 12, 2012. Yemen's defense minister narrowly escaped assassination Tuesday when a powerful car bomb ripped through his motorcade as it traveled in the nation's capital, killing at least 13 people in an attack that bore the hallmarks of al Qaeda. (AP Photo/Hani Mohammed)

Photo by: Hani Mohammed

Yemeni soldiers stand guard in front of Yemen's President Abed Rabbu Mansour Hadi's house as protestors demonstrate to denounce terror attacks and hail the decisions by Hadi to replace security officials in Sanaa, Yemen, Wednesday, Sept. 12, 2012. Yemen's defense minister narrowly escaped assassination Tuesday when a powerful car bomb ripped through his motorcade as it traveled in the nation's capital, killing at least 13 people in an attack that bore the hallmarks of al Qaeda. (AP Photo/Hani Mohammed)