It chooses from among nearly duplicate pictures the one with the sharpest focus and leaves out the others.

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The answer is it leaves the Americans, British and others trying to force the Europeans to cough up what G20 sherpas call "deliverables" on the future of the eurozone, before the rest of the world agrees to increase the firepower of the IMF.

BBC: The great shakedown in Cannes

But watching that act and others like it still leaves me unsatisfied.

WSJ: Culture City: An Opera Vet Tries to Raise The Circus

Not just a wicked witch, Ravenna is a monstrous gargoyle of feminine wiles, a spiritual vampire who feeds on others' youthful vitality and leaves them old and wizened in her stead.

CNN: Review: Theron gives new 'Snow White' film some spine

And its willingness to splash, and sometimes overstate, its every move leaves others cold.

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It lets others draft in your wake and leaves you too exhausted to kick hard across the finish.

WSJ: Menu

It is still very early on but this will already be the legacy that Cameron leaves behind, one that others in his shoes have tried and failed to achieve it in the past.

FORBES: Why Britain's Cameron Needs Nerves Of Steel

But unlike public goods, and like private ones, what one person takes leaves less for others.

ECONOMIST: The Nobel prize for economics

That leaves one PCP to care for every 900 Americans, less in some places and more in others.

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Alto said some of the big lecture room doors don't have locks and others open out to the hallway on the Berkeley campus, something he thinks leaves students on campus vulnerable to an attack.

CNN: readers: Are we safe on campus?