The MIPT Terrorism Knowledge Base
I apologize in advance if this site has been posted before. I just came across it, and I thought the group might find it useful http://www.tkb.org/Home.jsp

The MIPT Terrorism Knowledge Base (TKB ) is the one-stop resource for comprehensive research and analysis on global terrorist incidents, terrorism-related court cases, and terrorist groups and leaders. TKB covers the history, affiliations, locations, and tactics of terrorist groups operating across the world, with over 35 years of terrorism incident data and hundreds of group and leader profiles and trials. TKB also features interactive maps, statistical summaries, and analytical tools that can create custom graphs and tables.