Iowa became a "shall issue" state this January 1. This would never affect me, as I really don't drink anyway.
http://www.foxnews.com/politics/2011/03/02/iowa-compel-gun-carriers-breathalyzer-lose-permit/
http://www.foxnews.com/politics/2011/03/02/iowa-compel-gun-carriers-breathalyzer-lose-permit/