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3. Mach 2 craft

Alternative clues for the word sst

• Historic barrier breaker
• Bygone boom producer, briefly
• Mach 2 jet that ceased commercial flight in 2003: Abbr
• Scrapped airplane
• It doesn't fly anymore
• Plane with a machmeter: Abbr.
• Atl. crosser with a flexible nose
• Fast flyer to J.F.K., once
• Atl. crosser, once
• Sound barrier breaker: Abbr