They were pretending to be doing Hepatitis B vaccinations in an attempt to confirm the presence of Osama bin Laden in the area: https://en.wikipedia.org/wiki/Po

They were pretending to be doing Hepatitis B vaccinations in an attempt to confirm the presence of Osama bin Laden in the area: https://en.wikipedia.org/wiki/Poliomyelitis_in_Pakistan#Factors_affecting_eradication https://en.wikipedia.org/wiki/Poliomyelitis_in_Pakistan#Fact...