I. INTRODUCTION Terrorism is a complex and evolving phenomenon. In the past few decades, we witnessed an increase in the number of terrorist incidents in the world. The security and stability of many countries is threatened by terrorist groups. Even though the probability of high lethal terrorist incidents in the United States is low, foreign terrorist groups such as ISIS and Al-Qaeda are growing at an alarming rate. Perpetrators now use sophisticated weapons and the attacks are more and more lethal. Currently, terrorist incidents are highly unpredictable which allows terrorist groups to attack by surprise. The unpredictability is partly due to the lack of real time data and adequate risk analysis methodologies. To narrow the gap between terrorist groups and counter-terrorism experts, it is imperative to develop novel and proven methodologies along with sophisticated systems specially designed to solve terrorism related issues.