IMF's Lagarde under investigation

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The head of the IMF is formally investigated in a fraud probe which has rocked France. We ask if the affair will thwart Christine Lagarde's ambition to become French president. Also in this edition, would an independent Scotland be bad for business? After 130 heads of Scottish businesses expressed concerns in an open letter, we hear from both sides of the debate. Plus, the multi-million dollar battle to map, and zap, space junk.