Actually, I do not know much about Maria.

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Over the past few weeks, aircraft engineers have found they do not know quite as much about metal fatigue as they thought.

ECONOMIST: Aircraft fatigue

They do not know how much deliberation they have brought about.

ECONOMIST: American democracy: Building the perfect citizen | The

"For me the war is still present - it's present in all the families that do not know the truth about what has happened, " says Father Cortina, who spent much of the war as a parish priest in one of the most conflict-ridden areas of the country.

BBC: The BBC's Mike Lanchin

But it's hard to know how much more Cheney's doctors can do, since basic questions about his treatment have not been answered.

CNN: Just How Bad Was It?