| Answer | Crossword Clue |
|---|---|
| ALAS | "Sustineo ...": motto of the Air Force |
| ALAS | Sustineo ...: Air Force motto |
| ALAS | Sustineo ....: Air Force motto |
| ARDUA | Per ... ad astra (motto of the Royal Canadian Air Force) |
| ASTRA | "Per Ardua ad ..." (Royal Air Force motto) |
| ASTRA | Per Ardua ad ... (Royal Air Force motto) |
| ASTRA | "Per ardua ad ..." (Royal Air Force motto) |
| ASTRA | "Per Ardua ad ..." (U.S. Air Force motto) |
