One of the most destructive aliens known to mankind. They look kind of like rolling garbage cans... the aliens live inside this machine basically. I've met them twice now. The first time was in New York back in the 1930s. They were building a machine to turn humans into Daleks right on top of the Empire State Building. The second time... [is a little close to home. There's a pause.]
I was in New York again, but it was 2008. They killed my entire division. And that's when I was sent to destroy the world.