Anti-government protestors in Sanaa, Yemen on Tuesday, May 17, 2011. Hani Mohammed/AP hide caption

itoggle caption Hani Mohammed/AP

In Sanaa today, a Yemeni army officer reacts after he and other officers joined anti-government protesters demanding the resignation of President Ali Abdullah Saleh. Muhammed Muheisen/AP hide caption

itoggle caption Muhammed Muheisen/AP