An injured demonstrater lies on the ground in Yemen's Taiz province after Yemeni security forces shot and killed 15 anti-regime demonstrators and wounded scores more on the second day of lethal clashes in Taez, on April 4, 2011. The bloodshed came as demonstrators staged a march on the government headquarters in the city about 200 kilometres (125 miles) from the capital to demand the ouster of Yemen's embattled President Ali Abdullah Saleh. UPI