Our Corporate Governance Guidelines require that the board hold executive sessions, which are meetings of the non-management members of the board, at least twice per year, and that our independent directors meet in a private session that excludes management and any non-independent directors at least once per year. In accordance with our Corporate Governance Guidelines, our independent directors meet at least twice a year in a private session that excludes members of management and non-independent directors. Our lead independent director presides at such sessions.