Betraying Trust: America's Self Inflicted Wounds The 9/11 Commission Report's conclusion about a "failure of imagination" has been seized upon as a convenient scapegoat for the events of that day.
However, the truth is more nuanced and disturbing – America's intelligence institutions were crippled by a failure of trust. This failure allowed the attacks to occur and continues to imperil national security.
The issue was not simply siloed agencies refusing to share information, though this was certainly part of the problem. It was a deeper issue of faith – or rather, its absence.