"Iran is no threat to anybody in Iraq or elsewhere, and Iran is not preparing for any attacks anywhere," the spokesperson for Iran's mission to the United Nations said.
The department urged citizens to leave Iraq as soon as possible and avoid all U.S. facilities in the country.
Iran ultimately "intended to achieve absolute security, defined as the ability to thwart its adversaries' ability to overturn its regime or invade Iran militarily," according to a new report.
"We are actually considering escalating with Iran in a war that would further destabilize the region and unleash God knows what in terms of chaos in a very troubled region already," Elise Jordan said.
Iran said it would remain "committed to the framework" of the 2015 nuclear deal that the U.S. abandoned one year ago.
"It's a complete disregard for the judgment of those leaders who were put there to hear all the evidence and decided whether somebody was a murderer or not," said a lawyer who specializes in U.S. military cases.
Iran's top diplomat said his country would stop only "some" actions it has "voluntarily" carried out. But his counterpart in the U.S., which is no longer part of the deal, said Tehran's either in or out.
A review of persecution of Christians across the world finds alarming evidence that extremists are getting closer to eradicating Christianity in some areas.
Russia warned of tensions spilling over across regions such as Asia and Africa and warned that a U.S. failure to repair collapsing arms control treaties could destabilize global security.
Russia doubts a U.S. report alleging that Iran was behind the deaths of 608 U.S. troops in Iraq and pointed to the hundreds of thousands of civilians killed since the 2003 invasion.
"I want him to be remembered as the best father that anyone could ask for, and also at the same time being the best soldier that anyone could ask for," said the son of a soldier set to receive the Medal of Honor. "He was my icon."
The U.S. envoy to Syria said that "any government has the sovereign right to determine whether it wants foreign troops on its territory," but history repeatedly shows otherwise.
One researcher described the discovery as "a small revolution."
NATO launched its first-ever attack on a sovereign state two decades ago, paving the way for uncontested 21st century U.S. military action in the Middle East.
President Donald Trump has had at least 10 "mission-accomplished" moments in the U.S.-led fight against ISIS—which, though largely destroyed, continues to fight.
Ari Fleischer said Saddam Hussein was the "liar" who tricked President George W. Bush into thinking Iraq had weapons of mass destruction.
Top military officials from Iran, Iraq and Syria met to discuss working closer together and aligned their policies in what may be bad news for the U.S.
As Revolutionary Guards Quds Force commander Qassem Soleimani was honored at home, Iran built new trade ties with Iraq and Syria to counter U.S. sanctions.
Iranian Foreign Minister Mohammad Javad Zarif suddenly quit his post after being excluded from a visit by Syrian President Bashar al-Assad, now the Arab leader's invited him to meet in Damascus.
"American troops have been in Afghanistan for nearly 18 years, Iraq since 2003 and in Syria since 2015," Senator Bernie Sanders said.
Syrian troops backed by Russia and Iran have taken swaths of land from ISIS, and the U.S.-backed Syrian Democratic Forces have just begun their final fight.
U.S.-backed Kurdish forces are poised to seize control of the remaining ISIS stronghold in Syria.
"They want us to kill guys compassionately and only under the rules of engagement that they say to," Representative Duncan Hunter complained.
Veteran Middle East hands worry that the president's blunders and Iranian overreactions could lead to a shooting conflict nobody wants.
President Donald Trump said that it "should be formally announced sometime next week that we will have 100 percent of the caliphate."
"Iraq's constitution does not allow our territory of our country to be used against our neighbors," President Barham Salih said.