WASHINGTON (AP) -- If a day without Wikipedia was a bother, think bigger. In this plugged-in world, we would barely be able to cope if the entire Internet went down in a city, state or country for a day or a week.Sure, we'd survive. People have done it. Countries have, as Egypt did last year during the anti-government protests. And most of civilization went along until the 1990s without the Internet. But now we're so intertwined socially, financially and industrially that suddenly going back to the 1980s would hit the world as hard as a natural disaster, experts say.No email, Twitter or Facebook. No buying online. No stock trades. No just-in-time industrial shipping. No real-time tracking of diseases. It's gotten so that not just the entire Internet but individual websites such as Google are considered critical infrastructure, experts said.\Nobody would die