Most people still struggle to grasp what may have motivated Norway’s most-despised man, terrorist suspect Anders Behring Breivik, to kill dozens of people and harm hundreds of others. Time, the results of the ongoing investigation, and a careful reading of the “manifesto” Breivik released will surely provide some answers.

Stephen Sloan, the author of “Terrorism: The Present Threat in Context,” has worked for many years with the U.S. military on responding to and preventing terrorism. He discussed the investigation into an Army psychiatrist’s alleged rampage at Fort Hood with McClatchy-Tribune foreign-affairs columnist John C. Bersia.

Stephen Sloan, the author or co-author of Terrorism: The Present Threat in Context, Corporate Aviation Security and other books, is a professor and fellow at the University of Central Florida. He discussed developments in the alleged plot to target New York City’s JFK International Airport with foreign-affairs columnist John C. Bersia.