Iran says it will respond firmly to any US threat as tension spikes

On Thursday, an Iranian missile destroyed a US Global Hawk surveillance drone. Tehran said the drone was shot down over its territory and Washington said it had occurred in international airspace. US President Donald Trump said on Friday he aborted a military strike to retaliate for Iran's downing of the US drone because it could have killed 150 people, and signalled he was open to talks with Tehran. Iran has vowed to defend its borders.

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