Have you seen what they have done in Russia...
and in Israel. What about the attack in Spain or the ones in Malaysia? And are you forgetting the 9/11 attacks. Or what about the 1st WTC attack, The USS Cole or US African Embassy?
The terrorist actions across the globe speak for themselves.
Perhaps the reason America has not been attacked since 9/11 is because we are doing a good job fighting these terrorist and that maybe homeland security is working.