"I think it is more important to us to run a sharp business rather than try and plant flags everywhere and buy bigger planes, " he says.

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It is at this point that I think the great political, rather than economic, lesson needs to be pointed to.

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That language sounds a lot like the language that appears in the fundraising campaign, and it shows what I think is a less than serious appeal to fear rather than reason.

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But I think the reason is that you have to be rather dedicated to spot it because these plumes are only perhaps 50m to 100m across.

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Rather, it is the people behind the machines that I think we should be concerned with.

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"The crowd is able to help you when you need it but I don't think the pressure will affect Murray -- the home ground is definitely a boost rather than a burden, " the 34-year-old added.

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