People are saying that america is vulnerable to a cyber attack
http://www.origin.popularmechanics.com/tec...aw/4307521.html

They say that someone may be able to hack into a power plant's computers or some other government agencies computers.

Would it not make sense to just not connect these computers from external networks?

correct me if i missed something.

A major point of having a computer is the internet. But I guess there are a few cases where it could be better to not be connected to the internet.

Obviously, the most secure system will be one that isn't networked and is kept in a high-security location, but computers such as military systems need networks to function and to obtain information etc.