Napolitano said she hoped the U.S. could get to a place in the future where Americans would not have to be as guarded against terrorist attacks as they are and that she was actively promoting research into the psychology of how a terrorist becomes radicalized. “The long-term [question] is, how do we get out of this having to have an ever-increasing security apparatus because of terrorists and a terrorist attack?” she said. “I think having a better understanding of what causes someone to become a terrorist will be helpful." DHS and intelligence officials are not as far along in understanding...