The United States and Iran have reached a ceasefire agreement that will reopen the Strait of Hormuz to global shipping — one of the world's most critical oil transit routes. President Donald Trump confirmed the deal on Sunday, announcing that Iran will lift its blockade of the Strait on Friday and the US will simultaneously end its naval blockade. The agreement marks one of the most significant diplomatic breakthroughs in the Middle East in years, though experts caution that the hardest negotiations are still to come.

Both sides have publicly acknowledged the agreement, and Pakistan's Prime Minister — who helped mediate the talks — announced that a formal signing ceremony is scheduled for Friday, June 19th, in Switzerland. Vice President JD Vance confirmed he will attend, and sources suggest President Trump may also make an appearance, potentially before departing for the G7 summit in France.

What Does the US-Iran Deal Say About the Strait of Hormuz?

The Strait of Hormuz is the narrow waterway through which roughly 20% of the world's crude oil passes. Iran had shut it down as a pressure tactic during the conflict, causing massive disruption to global energy markets. The new agreement specifically calls for Iran to reopen the Strait on Friday, while the United States agrees to lift its naval blockade, allowing crude oil tankers to pass through freely once again.

This is arguably the most immediate and economically impactful element of the deal. Energy markets worldwide have been destabilized since the Strait's closure, and its reopening is expected to bring swift relief to oil prices and global supply chains. Critics, however, note that the Strait of Hormuz was never on the table before this conflict began — Iran had not previously dared to shut it down — meaning the US may have inadvertently handed Tehran a new and powerful leverage point it didn't previously hold.

What Are the Key Terms of the US-Iran Ceasefire?

Vice President Vance outlined several core points of the agreement during an interview on Fox News. According to Vance, the deal includes:

  • Reopening the Strait of Hormuz and lifting the US naval blockade
  • Immediate and permanent termination of military operations on all fronts, including in Lebanon
  • A built-in assurance that Iran will never pursue or acquire a nuclear weapon
  • Compliance verification mechanisms to ensure Iran holds up its end of the bargain
  • A 60-day period for further technical and diplomatic talks to iron out the full details

Pakistan's Prime Minister described the development as both sides declaring "the immediate and permanent termination of military operations on all fronts, including Lebanon." Still, both sides acknowledge that a memorandum of understanding — not a final, comprehensive treaty — has been agreed upon. The details of that memorandum have not yet been made public.

Vance was candid about the road ahead, saying: "I'm not going to say that everyone is going to sing Kumbaya tomorrow. It's going to take a little bit of time to learn the ways of peace, but I do think we took a major, major step tonight."

When and Where Will the US-Iran Deal Be Signed?

The formal signing ceremony is set for Friday, June 19th, in Bern, Switzerland. Switzerland has long served as a neutral diplomatic venue for sensitive international negotiations. Vice President Vance confirmed he plans to attend. President Trump had reportedly hoped to sign the deal on Sunday — his 80th birthday and Flag Day — but the formal ceremony was pushed to Friday to allow for preparatory and technical-level talks during the week.

One factor creating urgency around the timing was growing instability in the region. On Sunday, Israel struck Hezbollah targets near Beirut following a Hezbollah attack on Israeli territory, and intelligence suggested Iran may have been preparing retaliatory action. Locking in the agreement before further escalation was seen as critical by diplomatic observers.

Does the New Deal Prevent Iran From Getting a Nuclear Weapon?

This is perhaps the most consequential — and most contested — element of the emerging deal. The Trump administration has made preventing a nuclear-armed Iran its stated top priority, and Vance specifically cited a guarantee that Iran would never have or pursue a nuclear weapon as a core part of the agreement.

However, skeptics in Congress are already raising alarm bells. Iran has recently escalated efforts to protect its stockpile of near bomb-grade uranium, with intelligence sources telling CNN that Iran has been collapsing tunnels and placing explosive mines at entrances to its nuclear facilities — moves interpreted as attempts to prevent outside access or seizure.

Congressman Adam Smith (D-WA), the top Democrat on the House Armed Services Committee, made clear that without robust international inspection mechanisms, any nuclear guarantee is essentially unverifiable. "If we don't have international monitors, then we don't have a solid agreement," he said. "That's what you need — and that's what was negotiated under the JCPOA."

Iran has historically maintained it has no intention of building a nuclear weapon, a claim few Western governments take at face value. The precedent from the Obama-era nuclear deal — the Joint Comprehensive Plan of Action (JCPOA) — relied heavily on international inspectors and verified compliance mechanisms. Whether the Trump deal will include similar rigor remains to be seen.

How Does the New Iran Deal Compare to Obama's JCPOA?

Critics, including Congressman Smith, argue that the emerging agreement is essentially a return toward the JCPOA framework — the 2015 nuclear deal that Trump withdrew from in 2018. Under the JCPOA, Iran agreed to limit its nuclear activities in exchange for sanctions relief and access to frozen assets, with international inspectors verifying compliance.

Trump's withdrawal from the JCPOA was a defining early foreign policy decision, and he long argued the deal was weak and insufficient. Now, observers note that the new deal appears to be converging toward many of the same principles: nuclear limitations, verification, and economic relief for Iran in the form of frozen asset access.

"Trump is sort of limping back towards something very similar to that agreement," Smith said bluntly. He also noted that the Strait of Hormuz — now central to negotiations — was never a factor before this conflict because "Iran had not dared to try to shut it down." In his view, the war left the US in a measurably weaker negotiating position.

Iran's deputy foreign minister signaled that Tehran's continued participation in the 60-day follow-on talks will be contingent on receiving access to its frozen assets — a point that has historically been one of the most contentious issues in US-Iran diplomacy and one Trump has reportedly been reluctant to concede.

Why Did Pakistan Mediate the US-Iran Negotiations?

Pakistan has emerged as a surprising but effective diplomatic bridge between Washington and Tehran. As a Muslim-majority nation with historical ties to both the US and Iran — and no direct stake in the military conflict — Pakistan offered a level of neutrality and trust that few other countries could provide.

Pakistan's Prime Minister publicly announced the agreement on social media before either Washington or Tehran had made a formal statement, signaling how central Islamabad's role has been throughout the process. The choice of Switzerland for the signing ceremony further reflects the desire for a politically neutral setting to legitimize the agreement internationally.

What Happens Next After the Ceasefire Agreement?

The immediate next steps are clear: the Strait of Hormuz reopens Friday, military operations cease on all fronts, and the formal signing takes place in Geneva. After that, a 60-day window of technical and diplomatic negotiations begins, during which both sides must work out the finer details of the full agreement — including Iran's nuclear program, sanctions relief, frozen assets, and the role of international monitors.

These talks are expected to be extraordinarily complex. Iran's insistence on frozen asset access, ongoing questions about nuclear verification, and the broader regional dynamics involving Hezbollah and Lebanon all remain unresolved. As Vance acknowledged, this is a first step — a significant one, but only the beginning of what will likely be a long and difficult diplomatic road ahead.

For now, the world is watching Friday's signing ceremony closely. Whether it marks the beginning of a durable peace or simply a fragile pause in an ongoing crisis will depend on what happens in the 60 days that follow.