Authors:
  • There is a direct correlation between what al Qaeda says and what it does. And the one thing that has been the gold standard of correlation has been bin Laden's 1995 - or was it 1996? - pledge that every attack is going to be more powerful than the last. If you go back to the first attack in Yemen in 1992 and chart it out, every attack has been more powerful, more destructive than the last one.

    Source: www.pbs.org