| Clue | Source | Date |
|---|---|---|
| What a U.F.O. might turn out to be | New York Times | 24 Jan 2023 |
| [Circled letters]-filled contraption | New York Times | 05 Mar 2017 |
| [Circled letters]-filled contraption | ||
| Airborne data-gathering device | The Washington Post | 20 Jul 2016 |
| What you really saw? |