In May 2011, the Obama administration planned a secret raid to find Osama bin Laden, the al-Qaeda leader who was responsible for the September 11, 2001, terrorist attacks. The raid was dangerous and risky, with many unknowns facing the team. Chairman of the Joint Chiefs of Staff Mike Mullen describes his interactions with Vice President Joseph Biden, President Barack Obama, and Central Intelligence Agency Director Leon Panetta after bin Laden was killed.