body: I have a document from Science.gov and i wish to copy a graph of it in a commercial document. The document is described as:
  
  
  Distribution Category UC-42 
  
  
  Approved for public release; distribution is unlimited.
  
  
  Does that mean that there is no copyright protection the document?
  
  
  It's at the top of the third page:
  <http://www.osti.gov/scitech/servlets/purl/1130326/>
  
  
  here is another document with a copyright statement on line 10, i don't understand it. 
  <http://prod.sandia.gov/techlib/access-control.cgi/2007/076781.pdf>
  
  
  
title: Distribution Category UC42 Approved for public release; distribution is unlimited?