Al Qaeda operated a network of guest houses ( or safe houses ) in Afghanistan and Pakistan before and immediately after the 9/11 attacks . U.S. officials have said the identity of the courier was established in 2007 . Once the courier was known the U.S. began a path to the house where bin Laden lived . The Pakistani government has denied any involvement and says it is cooperating with the investigation. Bin Laden was killed by U.S. forces early Monday .
U.S. officials have said the identity of the courier was established in 2007 . Once the courier was known the U.S. began a path to the house where bin Laden lived . The Pakistani government has denied any involvement and says it is cooperating with the investigation. Bin Laden was killed by U.S. forces early Monday .