The Musudan missile, also known under the names BM-25, Taepodong X, Nodong / Rodong-B and Mirim, is a mobile intermediate-range ballistic missile developed by North Korea. The Musudan was first revealed to the international community in a military parade on 10 October 2010 celebrating the Korean Worker's Party's 65th anniversary, although experts believe these were mock-ups of the missile. The Musudan resembles the shape of the Soviet Union's R-27 Zyb submarine-launched missile, but is slightly longer. As of 2012, there was no indication that the missile system had been launch tested, or was operational.