It strikes me that trying to define where the front lines are might become a very difficult problem in wartime.
But Mr Clegg said the government had come up with a "fair and progressive solution to a very difficult problem".
And this is a very, very difficult problem -- there is no question -- and it has been a problem that previous Presidents have worked to resolve.
They have been asking the U.S. forces at checkpoints not to search the Iraqi women, but that is a very difficult problem that coalition security forces will have to work out.
But I believe we still have time to agree on a balanced solution, and I believe that the good experience Barack and myself have gained while working on the START Treaty will help us and be very useful when finding solution to this very difficult problem.
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And they have a tremendous amount of capacity of resources to deal with this very difficult problem, but it is a crisis significant enough that a lot of countries, including the United States, led by the United States, have come in to offer further aid and assistance and expertise to help them deal with it.
My wife had a very serious and difficult problem, and her GP advised that the only hospitals she should consider were Mass General and Beth Israel.
The problem: very difficult to generate a sustainable revenue model.
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Mr. PINCUS: Until we get control over that, until the state owned enterprises are reined in a bit, it's going to be very difficult to find a monetary solution to the problem.
The problem with that method is that it is very difficult for referees to deliver a fixed match.
The basic problem is that productivity in services is very much more difficult to increase than it is in manufacturing or agriculture.
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My spine is my biggest problem, so the loss of help at home is very difficult.
The main problem is that the complexity of computer networks makes it very difficult to quantify risk accurately.
In Madrid, we have the problem of the dry climate, so it's very difficult to have the clay that settles down properly.
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From my perspective, this is a simple problem that has very complicated politics and emotion that make it difficult to make progress.
"Ninety minutes of Premiership football would be very difficult at the moment but to come on as a substitute would be no problem, " added Smith.
The Citizens Advice Bureau (CAB) said it was difficult to assess the scale of the problem in Wales as victims were very reluctant to report problems to the police or trading standards.
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One problem is that the CIA's strict internal security policies make it very difficult to grant security clearances to people who have spent many years overseas or have close family members living in target countries.
But if we keep kicking the can down the road, the problem just keeps getting worse, and then at some point it will be very difficult to deal with because the consequences will be so painful.
The only problem is that after that quick boot I am left with an OS that is very difficult to use.
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