Relief officials in Pakistan are warning that some 240,000 children are now at risk after local Taliban warlords banned polio vaccination in both North and South Waziristan. The Taliban called the move a response to the ongoing drone attacks and the potential for espionage under the cover of immunization, citing the CIA-backed fake vaccination program that helped locate Osama bin Laden. Pakistan is one of three countries in the world where polio remains a large-scale risk.