Hard as Nails...

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Across
  1. 1. Type of coding, apparently impossible
  2. 4. LSD Experiments
  3. 5. The city of Russia's worst massacre in WW2
  4. 6. Aftermath of a nuclear war
  5. 8. The state of being imprisoned
  6. 11. Mines of ______
  7. 12. The Enigma Code was cracked here
  8. 14. Slang term used by WW2 soldiers to describe Germans
Down
  1. 2. Organisms found in extreme conditions
  2. 3. _________ Bay
  3. 7. To spoil the surface of something (Graffiti)
  4. 9. The end of the world
  5. 10. Dwarven City
  6. 13. Cuban Dictator