For Harlem's political class, the dispute over the benefit funds has been a source of tension.
However, strong tribal allegiances among the Turkmen can be a source of tension.
He said there was strong recent data for the U.S. economy, but the large fiscal deficit "remains a source of tension".
The plans, which have not been accepted by the prime minister, have been portrayed as a source of tension between Conservatives and Liberal Democrats.
At the same time, the survey said that income inequality and an ageing society were likely to be a source of tension in the long run.
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At the same time, Nasdaq executives hope that resolving the payout questions will lay to rest a source of tension between the company and some of its biggest customers.
But it also has been a source of tension.
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The closeness of Anglo-American military and intelligence ties, driven by the cold war, became a defining feature of British foreign policy and a source of tension between Britain and France, which led de Gaulle twice to veto British membership of the then European Economic Community, on the grounds of Britain's irremediable Atlanticism.
That's been a source of chronic tension in the Middle East for years.
It was a source of the tension between Tony Blair and Gordon Brown well into the new millennium.
At present, 80% of Russian gas exports to the EU flow through pipelines across Ukrainian soil, a source of ongoing tension.
The issue of illegal migration, and the treatment of Mexicans on the border, is a source of abiding tension between the US and Mexico.
The Doors' fame has hardly faded even though they're one of the few groups not to allow their music to be used for commercials, a source of great tension among surviving members.
One friend reported this as a major source of mother-daughter tension.
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The Labasse family are pieds-noirs from Algeria, repatriated to the south of France where father and grandfather Labasse own and run a hotel, alternately a source of pride and of growing domestic tension.
The day before, a Jewish fast-day, the main source of tension had been at Haram al-Sharif (Temple Mount) in Jerusalem.
"It does not result in a fair distribution of spending, and is becoming an increasing source of tension between the nations of the UK, " he said.
Another source of tension between Merck and Schering: Merck soon hopes to launch a new medicine, Cordaptive, that will compete with Zetia as a treatment that can be added to statin drugs like Zocor and Pfizer 's Lipitor.
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