Mr Ruckauf may also come to regret calling for more bullets for an already trigger-happy force.

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Ryan, for his part, called for a trigger that would force the President to come up first with a plan to make Social Security changes.

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Any attempt by the Moscow clergy to occupy Mary Magdalene's convent by force could also trigger a diplomatic brouhaha.

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It has floated the idea that everybody should be given the mobile phone number of their local copper and has made it easier for people to trigger inspections of their police force.

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The trigger built into the super committee is so draconian, an Air Force officer recently said that if the trigger was pulled, the service would, and I quote, have to change the way we do business or change the business we do.

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Who really believed that Field dropped his gun, and that the trigger could slam an armchair with sufficient force to explode a cartridge?

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But if those changes failed to occur within the defined period, a so-called "trigger" would provide for creating a public option to force change on the insurance companies, the source said.

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Rents directly or indirectly account for 29% of America's consumer-price index, so rising inflation would force the Fed to raise interest rates more swiftly, which could trigger a fall in house prices.

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But trying to force Mr Trimble to sit in a cabinet with Sinn Fein, without prior decommissioning, might well trigger a Unionist walk-out.

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