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3. Big and fast jet

Alternative clues for the word sst

• Streaker to Heathrow
• NASA low-noise prototype in development
• Orly bird, once?
• Jet that last flew in 2003
• The Tupolev Tu-144, e.g
• In-development Aerion AS2
• European streaker, once, in brief
• Speedy plane
• Boomer for nearly 35 yrs.
• Retired plane