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As protests following the death of #GeorgeFloyd spread across the US, and President Trump threatens to send in the army, how will the movement respond?

The Insurrection Act, a law passed in 1807, empowers the president to deploy military troops within the US in particular circumstances, such as domestic disturbances and to protect civil rights.

But what does this threat of force mean for America? And how will protestors respond?

Diplomatic Editor Mark Urban reports.