News Corp's U.K. attorneys have provided Parliament with an email thread that establishes that James Murdoch was informed of the wide extent of phone hacking at News Of The World — on a date that is earlier than he has previously claimed. For his part, Murdoch has written to Parliament that he received — but did not read — the emails. This revelation is a serious challenge to Murdoch's already tenuous credibility. For more, Melissa Block talks to NPR's David Folkenflik.