Observers say the army was prepared for such an attack and had already brought extra troops to Elephant Pass, the scene of constant skirmishes.

BBC: Tigers push northwards

What makes this extra tricky is that state estate and inheritance taxes have been in constant flux over the last decade.

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To folks like Bernie Sanders, the question of tax incidence seems to boil down to a question of multiplication: assume that incomes will remain constant as the tax rates increase, then just give the government its extra 5% or 10%.

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