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They also represent a part of a healthy environment that cannot be replaced.

VOA: special.2009.05.12

Passengers on the flight were moved to a later flight and the computer part will be replaced, an ANA official said.

CNN: Airline: Dreamliner fuel leak due to an open valve

The company did not say how many executives could be replaced as part of the restructuring.

CNN: Airport security firm adopts 'zero tolerance'

Manned aircraft may be replaced in part by unmanned aerial vehicles and satellites, he predicts.

ECONOMIST: Platform envy