Complex sentence: Some time in the 1980s a second Doomsday device, called "The Dead Hand", entered the picture, and unfortunately this name is a translation from the Russian, it's real, and it may be still armed.
Split into simpler sentences: Some time in the 1980s a second Doomsday device, called "The Dead Hand", entered the picture. Unfortunately this name is a translation from the Russian, and yes, it's Russian, it's real, and it may be still armed.