Oops! An error in a new law in Arkansas intended to set the minimum age to marry to 18 (with an exception for pregnant minors to marry as long as the parents agree) actually allowed someone who is not pregnant to marry at any age - even toddlers - if the parents allow it!
http://www.cnn.com/2007/US/law/10/11/marriage.age.arkansas.ap/index.html - Thanks Tiffany!