Bruce Schneier : I remember then-Attorney General John Ashcroft giving a speech in Minnesota -- where I live -- in 2003 in which he claimed that the fact there were no new terrorist attacks since 9/11 was proof that his policies were working . When horrific events happen , we look for patterns . He says people are n't good about understanding probabilities and often exaggerate risks . Obama : After Katrina , policies were implemented that caused enormous expense and damage . He says much can be learned if we look at patterns among many events .
Bruce Schneier : When horrific events happen , we look for patterns . He says people are n't good about understanding probabilities and often exaggerate risks . Obama : After Katrina , policies were implemented that caused enormous expense and damage . He says much can be learned if we look at patterns among many events .