| Clue | Source | Date |
|---|---|---|
| Gathering that aims to alleviate geopolitical tensions | USA Today | 10 May 2024 |
| Gathering of some Nobel laureates | USA Today | 14 Oct 2019 |
| Gathering of some Nobel laureates | ||
| President Clinton hosted one in 2000 | New York Times | 09 Sep 2017 |
| President Clinton hosted one in 2000 | ||
| Antiwar meeting |