The United States is facing a heightened threat environment following the US’s recent attacks on nuclear sites, according to the Department of Homeland Security. The White House stated that as of Monday morning, there are no specific threats.Secretary Kristi Noem of Homeland Security told reporters, “We recognize that as tensions escalate, that means there could be more potential for threats here at home.”A new Department of Homeland Security bulletin warns of a “heightened threat environment” in the U.S. due to the ongoing conflict. The bulletin suggests that cyberattacks from Iranian-backed hackers are likely, and violent extremists may be inspired to act, particularly against Jewish groups, if Iran calls for retaliation.Farah Pandith from the Council on Foreign Relations commented on Iran’s strategy, stating, “The play here, if you were Iran, is to think about the power of fear, if you know that the, that you can ideologically motivate people to do bad things in your name.”Noem addressed the threats on Monday.”We are continuing to evaluate every single threat, and to proactively go after them until they do anything or take any activity,” Noem said.Major cities, including New York, Washington, D.C., and Los Angeles, are actively monitoring for public safety threats following briefings from the DHS and FBI to state governors and other local officials on Sunday.Experts say direct attacks on U.S. soil are unlikely. Michael O’Hanlon from Brookings Institution said, “I think the most likely attacks from Iran will be in the region, in the Middle East, against military facilities.”Alongside the domestic security alert, the State Department has issued a worldwide travel warning, advising Americans abroad to exercise caution.Iran is also threatening to disrupt the global oil supply by closing the strategic Strait of Hormuz, a vital shipping lane for about 20 million barrels of oil daily. Such a move could send oil prices soaring and threaten the global economy. President Donald Trump has warned Iran against closing the Strait of Hormuz, stating that increased U.S. production can help offset any supply disruptions.