In Yemen, the government of U.S.-backed President Ali Abdullah Saleh is escalating a crackdown on opposition protests. On Tuesday, at least 50 people were wounded in the capital Sana’a after police opened fire on demonstrators attempting to join a pro-democracy encampment on a university campus. Four of the injured were left in critical condition. At least 27 people have been killed since protests erupted against Saleh last month.