Iran has denied ever pursuing nuclear arms. The argument goes that Kim Jong-un won't risk signing an agreement with major concessions, now that he sees how briskly Trump walks away from deals.
Iran is the world's fifth-largest oil producer, so when changes happen in oil production, they're felt directly in the wallets of American people.
In other words, Iran is likely to demand further concessions on sanctions and economic commitments from the remaining parties to the deal, which also includes China and Russian Federation, in return for continued cooperation.
As well as calling on Mr Trump to "avoid taking any action" that would "hinder" other countries from continuing the agreement "in the interests of our collective national security", Mr Johnson urged Iran to respond with "restraint" to the United States decision.
Mr Johnson said: "For as long as Iran abides by the agreement - and the IAEA [International Atomic Energy Agency] has publicly reported its compliance, Iran's compliance, nine times so far - then Britain will remain a party to the JCPOA".
Earlier, Iran's supreme leader Ayatollah Ali Khamenei chastised Mr Trump, while MPs set fire to a United States flag inside parliament, shouting, "Death to America!" The irony here is that Trump's actions were meant to isolate Iran on the world stage, but it is more likely to isolate us.
But hardliners, who have always been against the 2015 deal, stoked outrage against the U.S. Some staged a mass burning of U.S. flags in the center of Tehran.
One bit of advice that Barack Obama gave Trump during their transition in 2017 was that the office of the presidency is bigger than any one president.
Trump poured scorn on the "disastrous" 2015 accord in an address to the nation from the White House on Tuesday, describing the agreement as an "embarrassment" to the U.S. that does nothing to contain Iran's nuclear ambitions.
Trump also left open the possibility of a new deal, and told reporters Wednesday: "We'll make either a really good deal for the world or we're not going to make a deal at all".
Le Drian said "we are ready to work on a widened accord" that would address Trump's concerns about the 2015 deal aimed at curbing Iran's nuclear ambitions.
Even after the deal, Iran continued to preserve and expand its nuclear weapons know-how for future use at the Fordow nuclear testing site, said Netanyahu. At that time, President Obama said, "the United States together with the worldwide community has achieved something that decades of animosity has not: a comprehensive long-term deal with Iran that will prevent it from obtaining a nuclear weapon". "Any nation that helps Iran in its quest for nuclear weapons could also be strongly sanctioned by the United States". "In just a short period of time, the world's leading state sponsor of terror will be on the cusp of acquiring the world's most unsafe weapons", Trump said in a televised address from the White House. In exchange, Iran agreed to restrictions on its nuclear program, making it impossible to produce a bomb and establishing rigorous inspections.
Members of Iranian parliament struck a similar tone, burning a US flag and chanting "death to America".
Each has promised to abide by the deal after Trump's withdrawal, continuing to do business with Iran as they have since the agreement lifted worldwide sanctions.
Many Iranians are anxious about what Trump's decision could mean for their country. Trump has also likely created a pathway for Iran to build stronger relations with Europe, Russia, and China to maintain the deal.