On "Charlie Rose," a conversation with Jack Lew, the United States Secretary of the Treasury, a role he has served since February 2013. On Wednesday, he will deliver a speech on the impact of U.S. sanctions policy at the Carnegie Endowment for International Peace. Coordinated sanctions, led by the U.S., were integral to reaching an agreement with Iran to suspend their nuclear program. Sanctions policy is also playing a role in the fight against terrorist organizations including the Islamic State. (Source: Bloomberg)