A new Department of Homeland Security bulletin warns of a "heightened threat environment" in the U.S. due to the ongoing ...

Sleeper cells are spies or terrorists who operate in rival countries and remain inactive until they are essentially ordered ...

Gov. JB Pritkzer joined in a briefing with other American governors Sunday from Department of Homeland Security Secretary ...

The Department of Homeland Security has issued a National Terrorism Advisory System bulletin warning of increased ...

Iran sleeper cell threat is now a growing concern in the U.S. after Donald Trump suddenly left the G7 summit, reportedly due ...

The internal memo said groups tied to Iran "historically targeted U.S. interests in response to geopolitical events, and they ...

We’re overdue for a conversation about the Trump administration’s capacity to deal with what Homeland Security called a “heightened threat environment.” ...

The U.S. Department of Homeland Security (DHS) warned over the weekend of escalating cyberattack risks by Iran-backed hacking ...

Former acting ICE director warns former President Joe Biden's border crisis may have worsened Iranian sleeper cell threat as ...

Iran has often targeted U.S. digital systems. Last year, Iranian hackers pilfered and distributed sensitive documents from ...

The calls come after Homeland Security issued a bulletin calling on the public to report anything suspicious to officials ...

Iran's previous attacks on U.S. systems include last year's theft of sensitive documents from the Trump campaign.