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3. Very fast plane

Alternative clues for the word sst

• Aviation introduction of 1968
• Grounded jet, for short
• Former fast plane: Abbr
• Fast but expensive transport
• Atl. crosser until 2003
• Mach 1 breaker, once
• New flier of 1968
• Ultrafast plane, once
• Old aviation inits
• J.F.K. lander