File:Sikorsky HSS-1 of HS-9 in flight in 1957.jpg
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![File:Sikorsky HSS-1 of HS-9 in flight in 1957.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/1/19/Sikorsky_HSS-1_of_HS-9_in_flight_in_1957.jpg/800px-Sikorsky_HSS-1_of_HS-9_in_flight_in_1957.jpg?20161202165751)
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