CHAPEL HILL, N.C. -- Terrorism experts say a man who admits to plowing into a group of people to avenge the treatment of Muslims fits the description of a burgeoning type of terrorist -- a lone actor unaffiliated with any organization. Some students have called on school administrators to label Mohammed Taheri-azar a terrorist for his March 3 attack at the University of North Carolina at Chapel Hill. Although UNC Chancellor James Moeser has declined to define the attack, experts outside of the school have not been hesitant to offer their opinions. "Well, he's a terrorist," said Solomon Bradman, chief...