The post comes hours after Washington struck three key nuclear facilities in Iran Saturday night. Why It Matters. Iran is ...

The nation’s governors have been briefed by the Department of Homeland Security over a “heightened threat environment” after ...

The calls included one with hundreds of state and local law enforcement officials from around the country and another with state governors and their staff.

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

The Department of Homeland Security is warning of a "heightened threat environment" across the United States in response to ...

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

A threat assessment by the Center for Internet Security that was released after the U.S. bombing of Iran's nuclear facilities ...

Law enforcement agencies are tracking intelligence for any potential threats to the United States following strikes on Iran.

Local and state authorities remained vigilant Monday amid potential retaliation for U.S. military air strikes that targeted three nuclear weapons sites in Iran and in light of a warning from the U.S.

A new bulletin from DHS warns Americans of increased threats after U.S. strikes on Iran, and outlines what could happen next.