Video clip: National debt and budget deficit explained

 This video clip can be found at http://www.neok12.com/Economics.htm

             and the link is:

 http://www.neok12.com/php/watch.php?v=zX5d6141065c41695378730a&t=Economics

                                      Video clip questions:

1.  What exactly is the national debt?  Who do "we" owe the debt too?

2.  Are budget deficits always something that is undesirable?  Why or why not?