In the months before he was killed, the CIA maintained a safe house in Abbottabad, Pakistan, near Osama bin Laden's compound, The Washington Post reports.
The CIA used the house as a base of operations in its surveillance of bin Laden's walled-off compound. The Post reports that the CIA's work included meeting with Pakistani informants and using other sources to establish a "pattern of life" of the compound's residents and their activities.
The article cites anonymous U.S. officials, who said the mission was so costly that the CIA went to Congress in December to get permission to reallocate tens of millions of dollars in its budget to fund the mission.
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