On September 9, 2001 al-Qaeda suicide bombers assassinated Ahmed Shah Massoud. They had been posing as Moroccan documentary film makers. One man had a video camera filled with explosives. The other assassin tried to escape but was killed by Massoud's bodyguards. While the initial blast did not kill Massoud, he was severly injured in the head, chest, and legs. Efforts were made to get him to a hospital in Dushanbe, Tajikistan, but he died en route.
Worried that the Taliban and al-Qaeda would believe the Northern Alliance was leaderless and therefore vulnerable to attack, word was sent around the world that Massoud had been injured but was expected to survive.
Two days later, on September 11, al-Qaeda attacked the United States with more suicide bombers. To many people the assassination of Massoud is directly linked to the attack upon America. One school of thought is that bin Laden wanted to further indebt the Taliban to him by killing the man they most feared. Others believe that Massoud posed a threat to al-Qaeda itself. He was a man around whom America's responsive attack would most easily be built. With the death of Massoud, the United States lost its most valuable and able Afghan ally.