WASHINGTON (AP) — In a test of resolve and credibility for the United States and Iran, the two adversaries have taken steps sure to further inflame tensions in the Mideast and draw them closer to a flashpoint.

Iran announced it was breaking compliance with the international agreement that keeps it from making nuclear weapons and the Trump administration followed by ordering 1,000 more troops to the Middle East.

The Pentagon said Monday that the deployment includes security forces and troops for additional surveillance and intelligence-gathering. It represents an escalation of American military might aimed at deterring Iran and calming allies worried about the safety of strategic shipping lanes.

Iran soon could start enriching uranium to a step away from weapons-grade levels. That’s a challenge to President Donald Trump’s assurances to allies that the U.S. withdrawal from the deal last year made the world a safer place.

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