It seems like terrorist groups are bigger and more well-known than before. In decades past, there have been terrorist groups that targeted and attacked groups of people. Most of the time, these groups of people who were attacked were usually on airplanes. The terrorist groups in the past would bomb or take down an airplane full of people. Then they would claim responsibility. Today, it is different, terrorist groups like the Taliban and ISIS are gaining strength and target anyone.
They may arrive in a major city and then strike bystanders who are innocently walking around. ISIS does seem to have been be the most unpredictable and has been in power for many years. Within the past few months, ISIS has lost power.