NPR got to the bottom of Arizona's much-discussed controversial anti-immigration law — the one would require certain aliens to have documentation with them at all times, and gives the Arizona police broad powers to stop and detain anyone who appears to be an undocumented alien.  

The Arizona law would undoubtedly send hundreds of thousands of illegal immigrants to prison in a way never done before. 

So it comes as no surprise (in retrospect) that NPR discovered who was the impetus for pushing such a law: the private prison industry, who stand to make lots of money running and filling jails.  This law was a plan they devised some time ago, and they helped write the bill, and lobby for its passage.  Read the whole thing.