| Answer | Crossword Clue |
|---|---|
| SSTS | Mach-makers?: Abbr. |
| SSTS | Mach-makers: Abbr. |
| SSTS | Mach 2 attainers: Abbr. |
| SSTS | Mach speed jets: Abbr. |
| SST | Mach-2 flier (abbr.) |
| SST | Mach 2 flier: Abbr. |
| SSTS | Mach-speed jets: Abbr. |
| SSTS | Former Mach 2 fliers: Abbr. |
| SST | Former Mach 2 flier: Abbr. |
