AIRSPACE
| Date | Clue |
|---|---|
| 2014-09-13 | Valuable commodity in New York City |
| 2014-03-08 | It's flown in |
| 2012-03-13 | *Often-restricted zone |
| 2002-07-25 | Pilot's zone |
| 2002-01-31 | Planes need permission to enter it |
| 2001-06-29 | Flying zone |
| 1995-09-18 | Area protected by military planes |
| 1995-06-30 | It's guarded by military planes |