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US Elections - watch Nel's report

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It's US election day and voters across America will choose their next president.

After two years of campaigning costing around $2 billion (that's £1.3 billon), the big day is finally here.

Tens of millions of Americans will decide whether to re-elect current president Barack Obama, or to hand the job to his rival Mitt Romney.

We should know who has won by Wednesday morning.