FILE - In this June 23, 2011 file photo, then-CIA Director-desigate Gen. David Petraeus testifies on Capitol Hill in Washington. An anonymous email sent in May set off an elaborate chain of events that led to the downfall of former CIA Director David Petraeus, ensnared the top Afghan war chief and saw the Pentagon order a review of ethics training for senior officers. Lawmakers are demanding answers about who knew what and when.