APTOPIX Mideast Yemen

May 25, 2011 - 5:12 AM
Tribesmen carry an injured colleague during clashes with Yemeni security forces near the house of Sheik Sadeq al-Ahmar, the head of the powerful Hashid tribe, in Sanaa, Yemen, Tuesday, May 24, 2011. Fighters for Yemen's largest tribe sealed off key government buildings and barricaded streets in the heart of the capital Tuesday as the revolt against President Ali Abdullah Saleh sharply escalated after militiamen turned their guns against government forces. (AP Photo/Hani Mohammed)