Washington's exit from the deal and its revision is not the end of the world.
If there is a region in the world where tensions could lead to conflicts with terrible consequences, it is the Middle East. Washington, the principal ally of Saudi Arabia and Israel, and Moscow, ally of Iran and Syria, should act soon to lessen the tension.
The war in Yemen ... is taking on a much broader scenario in which the interests of international powers are engaged. Every move Trump makes in the coming days and months will have direct consequences.