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3. Former fast jet, in brief

Alternative clues for the word sst

• Once-and-future Mach 2 flier
• Retired flyer: Abbr
• J.F.K. speedster
• Aerospatiale product
• It has an adjustable nose
• Tupolev Tu-144, e.g
• Former Air France jet
• Unrealized 60's Boeing project
• Atl. speedster
• Grounded speedster