Recent satellite images have caught a disturbing sight in the middle of the Northern Chinese desert. Between miles and miles of sand lies a series of mock-ups of a US Navy aircraft carrier and other warships.It is believed that the fake vessels are being used to test a new powerful weapon: the DF-21 missile, or Carrier Killer.The strange footage has many experts wondering whether China has built or is in the process of finishing an anti-ship ballistic missile designed to annihilate American Navy carriers.