Example

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Across
  1. 1. The official language of our western neighbour. (4)
  2. 5. Country west of our western neighbour. (11)
  3. 8. Language spoken in then East Pakistan. (7)
  4. 10. The line that cuts “the line used to know time” to give us absolute location. (8)
  5. 11. Name of the country to our west, before 17 Dec. 1971. (4, 8)
  6. 14. The capital of Tunisia. (5)
  7. 17. The country that was East Pakistan before 17 Dec. 1971. (10)
  8. 18. Capital where Richard Nixon's office was. (10,2)
  9. 19. Unmanned aircraft used for spying and bombing. (5)
  10. 20. Cold war rival on the west of the Prime Meridian (abbreviation). (3)
Down
  1. 2. Capital of East Pakistan (old spelling). (5)
  2. 3. Capital of our western neighbour. (9)
  3. 4. Communist cold war rival in Eurasia in 1971 (abbreviation). (4)
  4. 5. The town where Osama bin Laden was found... and killed. (10)
  5. 6. The body of salt water to the south of what was East Pakistan (3, 2, 6)
  6. 7. Abbreviation for the uniform time used in our western neighbour. (3)
  7. 9. Body of salt water where our western neighbour has a port. (7,3)
  8. 12. Large body of salt water to our south. (6,5)
  9. 13. Time at the Prime Meridian. (3)
  10. 15. The line used to know time. (9)
  11. 16. The study of places. (9)