| Clue | Source | Date |
|---|---|---|
| The force to pump up tyres? (3,5) | ||
| Component of military force | ||
| Military might involving aviation | The Washington Post Sunday | 12 Sep 2021 |
| Renewable energy from a farm perhaps is used by flighty types as part of a campaign | Irish Times Crosaire | 29 Jul 2020 |
| Component of warfare since WWI | USA Today | 07 Mar 2018 |
| Military strength in the sky | Eugene Sheffer | 30 May 2016 |
| Military strength in the sky | ||
| Key to modern warfare | ||
| Military strength in the sky | ||
| Secy. Finletter's specialty. |