After anxious days awaiting Iran's response to the US assassination of Qasem Soleimani, the country sent missiles flying at two Iraqi military that housed US troops—who knew about it well in advance, thanks to an early warning system that dates back to the Cold War. In a rare reversal from the norm, Donald Trump followed up by using Twitter to defuse tensions rather than escalate them further. Iran's still on a path to developing nuclear capabilities, but they won't get there any time soon.

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