They deliberately let Bin Laden slip away to go after their real target - Saddam.
The fact that the Pentagon pulled the fighting force most equipped for hunting down Osama bin Laden from Afghanistan in March 2002 in order to pre-position it for Iraq cannot be denied.
Fifth Group Special Forces were a rare breed in the US military: they spoke Arabic, Pastun and Dari. They had been in Afghanistan for half a year, had developed a network of local sources and alliances, and believed that they were closing in on bin Laden.
Without warning, they were then given the task of tracking down Saddam. "We were going nuts on the ground about that decision," one of them recalls.
"In spite of the fact that it had taken five months to establish trust, suddenly there were two days to hand over to people who spoke no Dari, Pastun or Arabic, and had no rapport."
Along with the redeployment of human assets came a reallocation of sophisticated hardware. The US air force has only two specially-equipped RC135 U spy planes. They had successfully vectored in on al-Qaida leadership radio transmissions and cellphone calls, but they would no longer circle over the mountains of the Pakistan/Afghanistan border.