ON THE RELATION THE CONCEPT OF «TERRORIST ACTIVITY» AND «EXTREMIST ACTIVITY» Kireev Mikhail Pavlovich, Honoured Lawyer of the Russian Federation, Dr of Law, professor. <...> Place of employment: Management academy of MIA Russia. <...> Department: internal affairs management under special conditions chair. <...> Place of study: Management academy of MIA Russia. <...> Department: internal affairs management under special conditions chair. <...> E-mail: yurov.n@inbox.ru Annotation: In this article the relationship between the concepts «terrorist activitв» and «extremist activitв» through the elements of the criminal law and criminological characteristics. <...> В статье проводится соотношение понятий «террористическая деятельность» и «экстремистская деятельность» через элементы уголовно правовых и криминологических характеристик! <...>