MOSCOW (AFP) - Russia on Tuesday successfully test fired its long range ballistic missile RS-18 from its Baiknonur cosmodrome in Kazakhstan with a new warhead aimed at overcoming Western air defence systems, news agencies said. The RS-18, a warhorse missile known to the West as Stilet (Stileto) that the Russian defence ministry has given a new lease of life, successfully hit its target on the Kamchatka Pensinsula on the Pacific, the reports said. The RIA Novosti news agency said that the RS-18 missile was now carrying a new warhead aimed at overcoming missile defence systems.