FSB (Federal Security Service of the Russian Federation)

The Federal Security Service (FSB) is Russia's main domestic security agency, responsible for protecting the country from internal threats such as terrorism, espionage, and organized crime. It also handles surveillance, counterintelligence, and border security within Russia. As the successor to the Soviet KGB, the FSB plays a significant role in intelligence gathering and maintaining state security. It operates under the authority of the Russian government and works to ensure national stability, often integrating intelligence functions with law enforcement activities.