The American constitution vests its president with far more untrammelled authority in the foreign than the domestic sphere, so it is less easy to blame Congress for any failings.

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It's easy to lay blame at the feet of the politicians but Japan is a democracy and so everyone has to share responsibility, believes Tanaka.

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But the violence this week shows how easy it is to stoke latent tensions, and this time the Stormont politicians can't entirely blame a small unrepresentative minority.

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Rather than laying blame at door of the foodmakers, these studies emphasize lifestyles in which it is just as easy to avoid expending calories as it is to take them in (see: Judge to Fat Plaintiffs: Where's The Beef).

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