Heading into this week's NATO summit, the big agenda item was the future of the defense alliance and how President Trump would engage with it.
But on Tuesday, the US struck Iran dozens of times, with President Trump saying that the ceasefire between the US and Iran is "over."
At a meeting that was supposed to be about the unity of the transatlantic alliance, a conflict that’s further strained US-European relations has flared up again.
How did we get here?
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