Hundreds of thousands of people have fled North Waziristan since the launch of a government offensive on June 15 against the Pakistani Taliban in the tribal areas bordering Afghanistan . WHO warns Pakistan 's growing refugee population at risk of polio . The number of displaced could reach 600,000 in the northwest . North Waziristan , where the army is targeting militants , has the most cases . Score: 6
WHO warns Pakistan 's growing refugee population at risk of polio . The number of displaced could reach 600,000 in the northwest . North Waziristan , where the army is targeting militants , has the most cases . Score: 6