Once infrequent acts in large cities, acts of terrorism have become more frequent and have now been recorded in more than 160 countries. According to the most recently published Global Terrorism Index by the Institute for Economics and Peace (IEP), 2014 saw the most significant increase in recent history with more than 13,000 terrorist attacks worldwide. Even more alarming is that, in the past decade, more than 50 percent of all acts of terrorism had been carried out against police and private citizens. That percentage is more than government, transportation, and religious targets combined. An estimated 60 percent of terrorist attacks in 2014 were attributed to explosives devices, as seen in the attacks in Boston, Massachusetts, and Paris, France.