IDAHO FALLS, Idaho, May 1 -- The U.S. Department of Energy's Idaho National Laboratory issued the following news: Have you ever wondered what happens at Idaho National Laboratory? Did you know that you can tour INL's facilities? The lab actually has a tours department that gives close to 400 tours a year. So if you did want to come on a tour of INL, what would that be like? INL spans 890 square miles of the Arco desert. And that doesn't even include our facilities in Idaho Falls -- so you bett more PR