But they in turn find it difficult to extend their power across tribal lines.

ECONOMIST: Far more than two sides to the conflict

But it is incredibly difficult to accept that this confusion could extend to nine days after the events occurred.

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Deputy Eddie Noel, the Assistant Treasury Minister, said it was found to be technically feasible to extend the car park but the additional cost would be difficult to justify.

BBC: Car park 'could be redeveloped' as part of police HQ plan

Such technical levels are important to watch during times of economic uncertainty, because it is difficult to predict the fundamental triggers that could extend or reverse the bounce.

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The first minister insisted Scotland's freedom of information system was substantially better than those elsewhere and that now was not the moment to extend it at this difficult time.

BBC: First minister's questions

As we offer our appreciation and admiration for their difficult work, let us also extend our own offers of support to them and their loved ones.

WHITEHOUSE: The White House

These are also difficult to restructure, though there are hopes that Moscow will be willing to extend maturities and reduce interest rates.

WSJ: Island's Woes May Ripple Far Beyond the Shore

As broadband Internet access becomes widely available over the next 18 months, difficult decisions must be taken about whether it is right or practical to try to extend regulations designed for conventional television channels to on-demand content aggregated on new portals.

ECONOMIST: Regulating communications

The government is likely to begin negotiating with current franchises to extend contracts for the short term, which will prove a lengthy and difficult process.

BBC: Q&A: West Coast Main Line franchise