Aight man, I could really get into a fun e-fight with you, but I wont. I'm just gonna lay it down and leave, cause I have way cooler people to deal with than you.
If you think terrorism is not a threat, than you have the remarkable capability of ignoring countries full of people who want to kill us. Do you really need to see more than 3000 lives lost, more than 2 landmark buildings destroyed, no, you dont. You just need to realize that more dangerous than any attack thats ever been launched against us is the intent to launch more. These guys want to kill infidels, and they will stop at very little. Theres a fine line between not being worried, and being ignorant. I'm sure some terrorists would gladly rip apart more lives for you if you needed more proof, but you shouldn't. They value the destruction of our lives above their own lives, if that doesn't constitute a threat to you, than it is quite possible your IQ fails to exceed that of a chimp.