David Petraeus , last year as head of the department . He admitted to having an affair with his biographer . Petraeus , a retired four-star general , has stayed out of the limelight since the affair was revealed in November . In a rare public appearance , he said ` ` regret ''
David Petraeus , last year as head of the department . He admitted to having an affair with his biographer . In a rare public appearance , he said ` ` regret ''