Before the attacks, terrorism was certainly taken seriously but after the tragedy on 9/11, the term became synonymous with fear and anger. In this essay, I will examine the various ways in which terrorism has taken hold in the United States, and how the word has been used in a way that has changed our society.Gun Control Undeniably, the most obvious manifestation of terrorism since the 9/11 attacks has been on national security. One could argue that this anti-terrorism movement has been triggered by the 9/11 attacks.Terrorism’s Interaction with Social Networking Thomas Friedman.