Demonstrators hold pictures of slain protesters as they march in Sanaa, Yemen, on Sunday, March 18, 2012, to commemorate those who were killed a year ago in a particularly bloody protest. The writing in Arabic on the banner (foreground) reads, "Overthrow the family dictatorial regime." (AP Photo/Hani Mohammed)
Protestors attend Friday prayers during a rally demanding the trial of Yemen's former President Ali Abdullah Saleh, in Sanaa, Yemen, Friday, March 9, 2012. (AP Photo/Hani Mohammed)
Protesters attend prayers in Sanaa, Yemen, on Friday, March 2, 2012, during a rally demanding the trial of former Yemeni President Ali Abdullah Saleh. (AP Photo/Hani Mohammed)
A Yemeni walks past graffiti that reads, "Freedom is made by people," on a street where protesters demanded a trial for former Yemeni President Ali Abdullah Saleh in Sanaa, Yemen, on Friday, March 2, 2012. (AP Photo/Hani Mohammed)
Yemenis rally in Sanaa, Yemen, on Monday, Feb. 20, 2012, for Vice President Abed Rabbo Mansour Hadi (shown in the campaign poster), who is to become president after a vote Tuesday in which he was the only candidate. (AP Photo/Hani Mohammed)
Protesters in Sanaa, Yemen, react after receiving the news of the departure of Yemeni President Ali Abdullah Saleh for Oman on Sunday, Jan. 22, 2012. (AP Photo/Hani Mohammed)
Protestors stand behind the gate of a field hospital to watch wounded demonstrators being carried from the site of clashes with security forces, in Sanaa, Yemen, Saturday, Dec. 24, 2011. More than 100,000 protesters who entered Yemen's capital Saturday after a 4-day march from another city were attacked by elite troops loyal to outgoing President Ali Abdullah Saleh. (AP Photo/Hani Mohammed)
A wounded protestor is carried from the site of clashes with security forces in Sanaa, Yemen, Thursday, Nov. 24, 2011. (AP Photo/Hani Mohammed)
Yemeni female protestors march during a demonstration demanding the resignation of Yemen's President Ali Abdullah Saleh in Sanaa, Yemen, Monday, Nov. 21, 2011. Arabic on the banner reads, "people are free, and they reject immunity and guarantee Saleh." (AP Photo/Hani Mohammed)
