| Answer | Crossword Clue |
|---|---|
| LENA | 3,000-mile Siberian river. |
| LENA | 3,000 mile Siberian river. |
| LENA | Siberian river, 3,000 m. to the Arctic. |
| AMUR | 3,000-mile river of Asia. |
| LENA | 3,000-mile river to Nordenskjold Sea. |
| DEW | 3,000-mile radar |
| SAHARA | 3,300,000 square-mile desert |
