The real error was believing that jihad could be harnessed, controlled and directed to achieve a strategic purpose. That belief was wrong in 1978, it was wrong in 2001, it is wrong now, and it will be wrong tomorrow.(9/11, 2011)
Terrorism cannot be defeated. But terrorists can. The first step towards doing so is to stop enabling them, supporting them, cultivating them as a weapon against enemies real or imagined, and harboring the delusion that they can be controlled.(From Beslan to Boston, 2013)
Draw your own conclusions.