Clemens Perjury Case May Be In Trouble

The perjury case against baseball star Roger Clemens appeared to be falling apart on Wednesday. Key witness Andy Pettitte, who had previously said Clemens told him he had used human growth hormone, said he was only "50-50" on whether he heard Clemens correctly. And the judge is thinking about striking the Pettitte testimony. Nina Totenberg talks to Robert Siegel.