| Answer | Crossword Clue |
|---|---|
| USSR | The Great Enigma. |
| UFO | Enigma in the sky |
| ANDREIVISHINSKY | Enigma of the U. N. |
| CIA | Org. in the 1982 film "Enigma" |
| VSNAIPAUL | Nobel laureate who wrote "The Enigma of Arrival" |
| ultras | the British code name for intelligence gathered by decrypting German wireless communications enciphered on the Enigma machine during World War II |
| ultra | the British code name for intelligence gathered by decrypting German wireless communications enciphered on the Enigma machine during World War II |
