Nafeesa Syeed Caroline Alexander Bloomberg

Al-Qaida chief Osama bin Laden had to rely on video and audio messages recorded in remote hideouts and delivered to international television networks by supporters to claim responsibility for the Sept. 11, 2001 attacks.

Al-Qaida chief Osama bin Laden had to rely on video and audio messages recorded in remote hideouts and delivered to international television networks by supporters to claim responsibility for the Sept. 11, 2001 attacks.