PESHAWAR - The girls shot by Taliban hit squad trying to kill their classmate, Malala Yousufzai, returned to school on Thursday under tight security.A gunman attacked Malala, who campaigned for girls' education despite threats from the Taliban, on October 9 as she was leaving school in Swat valley. She was wounded in the head and her two school friends were also wounded.The shooting provoked widespread outrage and brought Malala, who is recovering in a British hospital, international admiration for her campaigning.On Thursday, police escorted her teenaged classmates, Kainat Riaz and Shazia Ramazan, back to school."I am very excited to resume my studies once again in the school, but I will definitely miss Malala," Kainat, who was shot in the arm, told Reuters.The two girls will have security escorts indefinitely, police said. The attack on Malala, 15, followed years of campaigning that had pitted the girl against most ruthless Taliban commanders, known as Maulana Fazlullah.Her father said in late October she would "rise again" to pursue her dreams after medical treatment. Tens of thousands of Britons have called on the government to nominate Yousufzai for a Nobel Peace Prize for her activism.Pakistan has 5 million children out of school, a number only surpassed by Nigeria, the UN cultural agency said in a report published this week. Two-thirds of those children are girls.