The price of security

How much is too much to pay for security? We could live in a much more secure nation, but that would require much less freedom. For example there are x-ray machines that only see through your clothes - if we install these at airports (train stations, etc) then it will be more difficult for people to sneak contraband onto the planes and cause others danger. But, as the Washington Post says: "are you ready to get naked for your country?"

Another example of where security and freedom go head to head is with wiretapping. We have all heard the news, and it is back again, the USA is listening when we talk to our friends. Newsday has a nice cartoon (here) that adds some humor to the wiretapping situation.

But the question is still, how much is too much? I wouldn't mind people listening to may calls when I am in the Middle East (if I ever went there). But I'm not sure I want to be strip searched every time I enter a plane.