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Bond ground all UK EC135s
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19th Dec 2013, 00:20
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AnFI
Join Date: Dec 2008
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UNKNOWN unknowns
Worth watching, the genius of Donald Rumsfeld was really identifying the
unknown
unknowns:
? Donald Rumsfeld Known Knowns, Known Unknowns, and Unknown Unknowns - YouTube
Something a helicopter pilot should always bear in mind...
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