Ultimately, only diplomacy can bring about a durable solution to the challenge posed by Iran’s nuclear program. As President and Commander in Chief, I will do what is necessary to prevent Iran from obtaining a nuclear weapon. However, I have a profound responsibility to try to resolve our differences peacefully, rather than rush towards conflict. Today, we have a real opportunity to achieve a comprehensive, peaceful settlement, and I believe we must test it.
Barack Obama, Remarks on the announcement of an historic agreement with Iran, Nov 23, 2013