It's All In Code

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Across
  1. 2. Code breaking centre in WW2
  2. 4. Wind talkers
  3. 6. Road sign with octagonal shape
  4. 9. Nato alphabet
  5. 10. Dave
  6. 11. FLOTUS
  7. 12. Introduced in 1943 in the US
  8. 13. Operation
  9. 14. Los Angeles Airport Code
Down
  1. 1. Signalling with Flags
  2. 3. Coding Machine
  3. 5. Author of The Da Vinci Code
  4. 6. First name of Morse Code inventor
  5. 7. Binary
  6. 8. Gum
  7. 11. Raised dots