| Clue | Source | Date |
|---|---|---|
| Increase security twofold ... and what 17-, 25-, 46- and 58-Across literally do | LA Times Daily | 18 Oct 2017 |
| Increase security twofold ... and what 17-, 25-, 46- and 58-Across literally do | The Washington Post | 18 Oct 2017 |
| Increase security twofold ... and what 17-, 25-, 46- and 58-Across literally do |