Recent newspaper reports appeared to cast doubt over the future of the Red Arrows.
The auditor general for Scotland, Robert Black, cast doubt over the agency's previous performance claims.
Some analysts said the trade figures cast doubt over whether exporters would be able to drive the UK recovery.
Some economists cast doubt over this claim, but what is clear is that Catalonia's economy is, unsurprisingly, inextricably linked to the rest of Spain.
Det Sup Sukhbir Singh of West Yorkshire Police said Mr Webb's history of lying inevitably cast doubt over his version of events surrounding the tragedy.
However, one industry watcher cast doubt over whether that would happen.
Delve's decision to move to Melbourne will cast doubt over his Welsh international career as the Super 15 rugby season goes head-to-head with the Six Nations.
The switching of his investment has cast doubt over the future of Sauber's other driver this year, Japan's Kamui Kobayashi -- who has no major sponsor.
Wales boss John Toshack has cast doubt over Bellamy's future after refusing to be drawn into whether he would play a part in the Euro 2012 qualifiers.
Maradona, whose team are in real danger of missing out on the World Cup, seemed to cast doubt over his future in a news conference on Wednesday.
But the government spending watchdog has cast doubt over the long term success of the project, despite it being the largest single tourism project undertaken in Northern Ireland.
While Yahoo maintained its position as one of the top three web brands, an earlier study cast doubt over its ability to retain the position over coming years.
Nissen's inflammation theory could help Pfizer cast doubt over whether Vytorin or another competitor-- AstraZeneca 's (nyse: AZN - news - people ) Crestor--can live up to Lipitor's proven results.
The eruption of bipartisan ire over the failed financial bailout bill Monday cast doubt over the green energy industry that Congress would be able to pass anything until after next year's presidential inauguration.
An ongoing UK study, The Warwick Microwind Trial Project appears to cast further doubt over the usefulness of turbines in urban environments.
That will cast further doubt over the journalist's judgment.
The episode seemed to cast a momentary doubt over Britain's decision to release him from almost 17 months' detention, on the ground that the elderly general was too ill for extradition or trial.
On Friday, Mr Howard cast doubt on whether that in the contact over Mr Mittal the situation was routine.
"It's a thorny issue on both sides, especially since the U.K. has cast doubt on whether Berezovsky would receive a fair trial over there and indeed be safe, " said Global Insight's Augur, adding that it is unlikely that Lugovoi will be extradited.
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