On Christmas Eve in 1985, the United Kingdom's flag carrier British Airways chose to celebrate the holiday season and the tenth anniversary of its launch of supersonic flights by operating a unique stunt. The airline flew four delta-winged Concorde jets in a unique diamond formation during the memorable flight.
Ten years before the event, the airline had launched its first commercial supersonic route between London and the American capital of Washington DC. Over that decade, the carrier's Concordes had gathered an impressive combined 71,000 flying hours.
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