If you believed in Lance Armstrong through all the mud-slinging, government leaks and "60 Minutes" disclosures, I suppose you feel vindicated today.

Federal prosecutors in Los Angeles told the Associated Press that they've closed a criminal investigation into doping allegations against the 7-time Tour de France winner.

A statement from the U.S. attorney's office said Armstrong would not be criminally charged, but did not explain why.

Los Angeles had been the site of a federal grand jury ...