BBC analysis: “It is an unprecedented moment, but what the US does and Iran could now be even more transcendental”

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    • Author, Lyse Doucet
    • Author’s title, International Chief correspondent, BBC News

For decades, the United States and Iran have carefully avoided crossing the dangerous red line that would lead to direct military confrontation.

One after another, US presidents have refrained from deploying their military power against the Islamic Republic for fear of plungeing the United States in which it could be the most dangerous war of all in the Middle East.

Now Trump, the American commander in chief, who promised to be a pacifist president, has crossed this blond with direct military attacks against Tehran’s nuclear facilities, the most significant measure until now of the second mandate of a president who is proud to break all the old rules.

It is an unprecedented moment that is causing alarm in capitals around the world.