Mourners poured into the streets of this grieving city Wednesday as families buried children who were slain at an army-run school and Pakistan’s prime minister vowed to fight “until all terrorists are defeated.” Three staff members of the Army Public School died of their injuries, raising the death toll from the attack to 144, including 132 children, hospital officials told Pakistani media. PAKISTAN-UNREST-SCHOOL Hasham Ahmed / AFP/Getty Images Pakistani Muslims offer prayers during a funeral ceremony on Wednesday, a day after an attack on an army-run school by Taliban militants in Peshawar, Pakistan. (Hasham Ahmed / AFP/Getty Images) In Landi Arbab, a village of green…