The 9/11 Commission Report: Final Strategies And Tactics

With the planning stages near completion, members of Al Qaeda and Taliban were adamantly opposed to Osama Bin Laden's "planes operation" citing retaliatory attacks against a US coalition military that would decimate both originations and eliminate any possibility of controlling Afghanistan. Meanwhile the commission would report the following: "KSM remembers Mohamed Atef telling him that Al Qaeda had an agreement with the Taliban to eliminate Ahmed Shah Massoud, after which the Taliban would begin an offensive to take over Afghanistan. Atef hoped Massoud’s death would also appease the Taliban when the 9/11 attacks happened."