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Interim U.S.-Iran Security Agreement Takes Effect to Reopen Strait of Hormuz

Vice President Vance to lead further talks in Switzerland as Trump warns of resumed strikes for any violations.

June 18, 2026 at 3:00 PM

An interim maritime and nuclear framework between the United States and Iran has officially taken effect, aiming to de-escalate tensions in the Persian Gulf. The agreement facilitates the reopening of the Strait of Hormuz and ends the blockade of Iranian ports, a move President Trump expects will lower global oil prices. Under the terms, Iran has committed to diluting its stockpile of highly enriched uranium under international supervision and has pledged not to develop nuclear weapons. Despite the implementation of the memo, President Trump has maintained a hardline stance, publicly stating that the U.S. remains prepared to resume bombing campaigns or reinstate naval blockades if Iran deviates from the agreement. The President defended the deal against domestic critics who argue the terms are too favorable to Tehran, characterizing the framework as a necessary step toward a longer truce and regional stability. The diplomatic focus now shifts to Switzerland, where Vice President J.D. Vance is slated to lead the next phase of high-level negotiations. This 60-day window is intended to resolve core issues left out of the interim document and move toward a final settlement. The agreement has already triggered secondary effects, including the lifting of U.S. travel bans for several Gulf nations.

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