Are U.S. Government Bonds AAA or Junk?…And Who’s Lying?

The U.S. government is in debt $21 Trillion, an amount that can never be paid. Yet Moody’s and Fitch reaffirmed their top AAA rating on U.S. debt. Why do they do this? Do they have to? Why can’t politicians, the media, CEO’s, or anyone else, ever tell Americans the truth?