As President Obama prepares to begin his second term in office, there is no shortage of global challenges facing the U.S. From ongoing turmoil in the Middle East and the need to "pivot" to the Pacific in response to China's rise, situations demanding the administration's attention abound. And the clock is still ticking on Iran's movement toward becoming a nuclear power. To gain insight into what we can expect from Obama Administration foreign policy during the next four years, we spoke with veteran journalist David Ignatius of The Washington Post.