using the following political description of terrorism: Criminal acts intended or calculated to provoke a state of terror in the public, a group of persons or particular persons for political purposes are in any circumstance unjustifiable, whatever the considerations of a political, philosophical, ideological, racial, ethnic, religious or any other nature that may be invoked to justify them. U.S. law Various legal systems and government agencies use different definitions of terrorism in their national legislation. U.S. Code Title 22 Chapter 38, Section 2656f(d) defines terrorism as: "Premeditated, politically motivated violence perpetrated against noncombatant targets by subnational groups or clandestine agents". 18 U.S.C. § 2331 defines "international terrorism" and "domestic terrorism" for purposes of Chapter 113B of the Code, entitled "Terrorism": "International terrorism" means activities with the following three characteristics: Media spectacle A definition proposed by Carsten Bockstette at the George C. Marshall European Center for Security Studies, underlines the psychological and tactical aspects of terrorism: Terrorists attack national symbols, which may negatively affect a government, while increasing the prestige of the given terrorist group or its ideology. Political violence Terrorist acts frequently have a political purpose. Some official, governmental definitions of terrorism use the criterion of the illegitimacy or unlawfulness of the act. to distinguish between actions authorized by a government (and thus "lawful") and those of other actors, including individuals and small groups. For example, carrying out a strategic bombing on an enemy city, which is designed to affect civilian support for a cause, would not be considered terrorism if it were authorized by a government. This criterion is inherently problematic and is not universally accepted, because: it denies the existence of state terrorism. An associated term is violent non-state actor. According to Ali Khan, the distinction lies ultimately in a political judgment. Pejorative use Having the connotation of "something morally wrong", the term "terrorism" is often used to abuse or denounce opposite parties, either governments or non-state groups. An example of this is the terruqueo political attack used by right-wing groups in Peru to target leftist groups or those opposed to the neoliberal status quo, likening opponents to guerillas from the internal conflict in Peru. Those labeled "terrorists" by their opponents rarely identify themselves as such, and typically use other terms or terms specific to their situation, such as separatist, freedom fighter, liberator, revolutionary, vigilante, militant, paramilitary, guerrilla, rebel, patriot, or any similar-meaning word in other languages and