Business failure was not nearly as bad as operating outside the success formula.

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But we will be operating in a world that is incomplete and prone to failure.

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But last July one of the spacecraft's four reaction wheels broke down, leaving scientists aware that a further failure was likely and would prevent the telescope operating as it should.

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The FAA said the revocations cite several violations of regulations, including failure to comply with air traffic control and clearances and operating carelessly and recklessly.

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