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WATCH: Sikorsky-Boeing Defiant completes ground run
Sikorsky and Boeing have provided the first video of the SB1 Defiant, while performing ground runs in Florida.
By Jeff Martin
Latest "Defiant" stories
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First flight for Defiant delayed to 2019
The second competitor in the U.S. Army's future vertical lift fight will stay grounded for at least a few more weeks.
By Aaron Mehta