It also can be used to make nuclear weapons.
According to former USA officials and analysts, Trump's hawkish national security adviser John Bolton is pushing the Trump administration to take a hardline position on Iran.
Trump has tightened economic sanctions against Iran, and his administration says it has built up the United States military presence in the region.
In Saudi Arabia, the kingdom's military intercepted two missiles fired by the Iranian-allied Houthi rebels in neighboring Yemen.More news: Overmars encourages 'big clubs' to make offers for Ajax star
"I would say to the Iranians, do not underestimate the resolve of the U.S side in this situation", stated British Foreign Minister Jeremy Hunt.
FILE - In this February 27, 2005 file photo, The reactor building of Iran's nuclear power plant is seen, at Bushehr, Iran, 750 miles (1,245 kilometers) south of the capital Tehran. Since Trump withdrew America a year ago from the pact, the US has re-imposed previous sanctions and come up with new ones, as well as warning other nations they would be subject to sanctions as well if they import Iranian oil. He accused them of "milking despotic butchers via massive arms sales", an apparent reference to Iran's main regional foe, Saudi Arabia, Washington's biggest arms buyer.
But by increasing production, Iran soon will exceed the stockpile limitations set by the accord.
His warning to Iran was issued hours after a rocket was sacked into the heavily fortified Green Zone in the Iraqi capital, Baghdad, and hit a building about 0.5km (0.3 miles) from the U.S. embassy. No injuries or damage were reported. That area is home to many Iran-supported militias. "Having all these military assets in a small area is in of itself prone to accidents, extreme prudence is required and the United States is playing a very, very unsafe game", Zarif said.
Iranian Foreign Minister Mohammad Javad Zarif posted his own message Monday on Twitter, saying Trump had been "goaded" into "genocidal taunts". 'Try respect - it works!'More news: Egypt bus explosion near pyramids leaves 17 injured
Defense officials said no additional Iranian threats or incidents had emerged in the days since the USS Abraham Lincoln carrier battle group arrived in the Arabian Sea late last week.
And on May 8, a year to the day that Trump pulled out of the deal, he announced further sanctions on Iran's metal exports, including iron, steel, aluminum and copper.
May 12: The United Arab Emirates says four commercial ships off its eastern coast "were subjected to sabotage operations", just hours after Iranian and Lebanese media outlets air false reports of explosions at a nearby Emirati port.
Trump told reporters as he departed the White House for an event in Pennsylvania that he was willing to have talks with Iran "when they're ready" but no discussions were going on now. That shrunken ability to deal with the outside world and decreasing government revenues are Iran's two main concerns at the moment, he said.
A United Nations spokesman said on Monday that the worldwide body was "concerned about the rising rhetoric".
Two US warships have arrived in the region and the US has increased naval patrols in the Gulf of Oman. George Grow was the editor.More news: NASA shares first image of Astrobee 'Bumble' robotic assistant on ISS
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