Anti-government protestors throw a boy into the air during a demonstration demanding the resignation of Yemeni President Ali Abdullah Saleh, in Sanaa, Yemen, Tuesday, March 15, 2011. Witnesses in a Yemeni border town say armed anti-government tribesmen stormed a security building, killing four soldiers in a revenge attack after government troops opened fire on opposition protesters. The attack in the town of al-Jawf, close to the border with Saudi Arabia, came late on Monday, after government troops shot at and wounded 20 protesters rallying at the town's administrative complex. (AP Photo/Muhammed Muheisen)