Last week's Security Weekly discussed the fact that terrorism is a tactic used by many different classes of actors and that, while the perpetrators and tactics of terrorism may change in response to shifts in larger geopolitical cycles, these changes will never result in the end of terrorism. Since that analysis was written, there have been jihadist-related attacks in Afghanistan, Nigeria, Yemen and Pakistan, an assassination attempt against the president of Abkhazia, and a failed timed-incendiary attack against the Athens subway. (The latter incident, which militant anarchists claimed, reinforces that jihadists are not the only ones who practice terrorism.) But while terrorism is a continuing concern, it can be understood, and measures can be taken to thwart terrorist plots and mitigate the effects of attacks. Perhaps the most important and fundamental point to understand about terrorism is that attacks do not appear out of nowhere. Individuals planning a terrorist attack follow a discernable cycle -- and that cycle and the behaviors associated with it can be observed if they are being looked for. We refer to these points where terrorism-related behavior can be most readily observed as vulnerabilities in the terrorist attack cycle. Read More » Comments? Send them to responses@stratfor.com