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3. Grounded JFK jet

Alternative clues for the word sst

• Former boomer, briefly
• Queen's way to the U.S.A.
• Retired Mach 2 breaker
• Concorde, e.g., briefly
• The Concorde, e.g.
• Jet decommissioned in '03
• Retired boomer, briefly
• Former Mach 2 flier: Abbr
• Old boom-creating speedster, briefly
• Grounded flier, briefly