CAST sponsored a three-day symposium in Washington, D.C. in June 2010, in cooperation with USDA, on Sustaining Animal Agriculture. Thirty-two presenters addressed bioethical and animal welfare issues, certification and regulatory programs, the ethical use of food animals, long-term food security, societal and global impacts, and the consequences of decisions by consumers and government decision makers. Approximately 250 attendees from a wide variety of organizations participated in Q&A sessions throughout the meeting.