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3. Newsworthy jet

Alternative clues for the word sst

• Concorde, for one: Abbr
• Air France's 2003 Smithsonian donation
• Former boomer
• Old boom-creating speedster, briefly
• Old J.F.K. arrival
• Grounded plane: Abbr
• Stratosphere streaker, once
• Rapid transit
• One with delta wings, briefly
• Its business is booming