Tip of the day: Do not go to the United States of America. Not for business trips, tourism, to work, nothing. According to the US Justice Department, forreigners suspected of terrorism may now be held prisoners indefinately without rights to a trial. For details, read more in The Washington Post or search Google.
And by the way, if you already live in the US, be sure to bring your ID everywhere. This poor guy [strong scenes] went to the library of his university without bringing his ID and was given at least four electrical shocks with a stun gun by the police. I'm sure it had nothing to do with his ethnical roots. (His name is Mostafa Tabatabainejad.) More details here.