Watchmen: Dr. M flees Earth

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Across
  1. 5. Type of butter, as well as recently missing comic artist.
  2. 6. Red half of the Cold War
  3. 7. Reactors, bombs, and now glowing blue people...
  4. 8. The original "Watchers", associated with clocks.
Down
  1. 1. The Dr. who causes cancer rather than cures it.
  2. 2. The Red, White, and Blue chief of office.
  3. 3. Long version of 'Ma'am'
  4. 4. Occurs when you sleep - often described with prefix "American"
  5. 5. Something to keep quiet about
  6. 9. Stars and Stripes half of the Cold War