"First, they are very narrow, but they are also very long, " explains Avouris.

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But United also says that not all very long-haul routes merit first-class service.

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"It is a tremendous tragedy and it is a tremendous loss but it has also made many of us think very long and hard about what we do and how we do it and try and be better, " she said.

BBC: 'The world is missing something'

The move should placate investors who feared that the company was running out of cash, but it also makes it very clear that the company has no long-term future.

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Much orchestral music of the nineteenth and twentieth centuries also calls for bass trombone, but since the true bass trombone is a very long, very unwieldy instrument, most bass trombone parts are played today on a hybrid instrument called the tenor-bass trombone.

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Smartphone sales may increase postpaid subscriber additions and bring in juicy data revenues, but they are also very expensive due to the huge subsidies that carriers provide in return for long-term contract plans.

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But I also see that there are two high-profile incidents of women going missing, and for a very long time.

NPR: The Missing Women Were Seemingly In Plain Sight

But we'll also be there in the months and years to come in what will clearly be a very long-term project of renewal and of rebuilding.

WHITEHOUSE: Press Briefing