Global Terrorism Database (GTD)Provided through the National Consortium for the Study of Terrorism and Responses to Terrorism (START), University of Maryland. An open-source database including information on terrorist events around the world from 1970 through 2016. For each GTD incident, information is available on the date and location of the incident, the weapons used and nature of the target, the number of casualties, and--when identifiable--the group or individual responsible.