Moscow carried out a successful test of its new “invincible” nuclear-capable cruise missile, with the Kremlin working towards military deployment of the weapon, Russian President Vladimir Putin said on Sunday. Little is known about the Burevestnik missile, which NATO code-named Skyfall, with Putin previously touting it as his “invincible” weapon capable of bypassing all current and future missile defense systems, with the nuclear arm said to have a nearly unlimited range and an unpredictable flight path.