Osama bin Laden, the founder and former leader of al-Qaeda, went into hiding following the start of the War in Afghanistan in order to avoid capture by the United States and/or its allies for his role in the September 11, 2001 attacks, and having been on the FBI Ten Most Wanted Fugitives list since 1999. After evading capture at the Battle of Tora Bora in December 2001, his whereabouts became unclear, and various rumours about his health, continued role in al-Qaeda, and location were circulated. Bin Laden also released several video and audio recordings during this time.