Before the two packs - which at Test level can weigh in the region of 120 stone each - often charged into contact from as much as three feet away.

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According to Nascar rules, drivers weighing less than 180 pounds have to weigh down their cars to level the playing field.

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Either the economy will recover, and labour costs will rise, or the high level of unemployment will weigh on demand and revenues will suffer.

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On a deeper level mental agility is the capacity to weigh conflicting options, to be able to make hard choices when both options are good, such as which business to buy or which employee to promote.

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Those sources say both Tsarnaev's legal team and top-level Justice Department officials also have been meeting separately to weigh their options.

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