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The crash of a Marine Corps helicopter last year that killed five service members was ultimately caused by pilot error.
The limits of night vision goggles also have been ... determine distance and can be degraded by weather or light pollution. The Marine helicopter was flying in icing conditions with low cloud ...
The limits of night vision goggles also have been ... determine distance and can be degraded by weather or light pollution. The Marine helicopter was flying in icing conditions with low cloud ...