The action division ("Division Action") is responsible for planning and performing clandestine operations. It also performs other security-related operations such as testing the security of nuclear power plants (as it was revealed in "Le Canard Enchaîné" in 1990) and military facilities such as the submarine base of the Île Longue, Bretagne. The division's headquarters are located at the fort of Noisy-le-Sec. As the DGSE has a close partnership with the """" of the Army or COS (Special Operations Command), the Action Division selects most of its men from regiments of this military organization, the "1er Régiment de Parachutistes d'Infanterie de Marine", 1er R.P.I.Ma (1st Marine Infantry Parachute Regiment) and the "13e Régiment de Dragons Parachutistes", 13e RDP (13th Parachute Dragoon Regiment) in particular. But, in general, a large number of DGSE executives and staff members under military statuses, and also of operatives first enlisted in one of these two last regiments, and also in the past in the "11e régiment parachutiste de choc", 11e RPC (11th Shock Parachute Regiment), colloquially called "11e Choc," and in the "", 1er BPC (1st Shock Parachute Battalion), colloquially called "1er Choc."