In July 2011, a fake vaccination program by the CIA was uncovered. It then emerged that Dr. Shakil Afridi, the person organising the CIA's "vaccinations", had claimed that he was a Save the Children employee. In May 2012, Save the Children's country director for Pakistan, David Wright, revealed that the organisation's work had been badly disrupted ever since Afridi had made his claim, with medicines held up for long periods at airports, staff unable to get visas, and so forth. Wright also charged that the CIA had breached international humanitarian law and risked the safety of aid groups worldwide. "It was a setback, no doubt," said Dr. Elias Durry, the World Health Organization's polio coordinator for Pakistan, a few months later. Later that year, in September, it was reported that the Pakistani government had requested Save the Children's foreign staff to leave the country, In January 2013, the Deans of twelve top US schools of public health sent a letter to President Obama protesting against the entanglement of intelligence operations in public health campaigns. The letter describes the negative and lasting impacts of the Central Intelligence Agency's (CIA) use of a fake vaccination campaign in Pakistan during the hunt for Osama bin Laden in 2011, which exacerbated the already persistent public mistrust of vaccines in the country.