President Donald Trump announced his appointments to an advisory council inside the Department of Homeland Security on ...

The scheme was revealed to law enforcement by an accused Iranian government asset who spent time in American prisons for ...

ICE arrests four additional Iranian nationals with criminal histories amid concerns about sleeper cells following strikes on ...

Maddow highlighted the résumé — or lack thereof — of Thomas Fugate, the “lawn boy and Model U.N. kid” overseeing terrorism ...

Sources told NBC News Iran sent a communication to President Trump last week, threatening to activate sleeper-cell terror ...

The United States is on heightened alert after Iran launched a retaliatory missile strike targeting a U.S. air base in Qatar ...

The Department of Homeland Security issued an advisory June 22 warning Americans cyber attacks are likely, and violence in ...

Federal officials are warning of a heightened terrorism threat in the United States through late September, citing geopolitical tensions involving Iran.

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

Senate Democratic Leader Chuck Schumer (N.Y.) has led Senate Democrats in sending a letter to Homeland Security Secretary ...

Homeland Security officials are warning Americans of heightened threats in the United States after the attacks on Iran. The Department of Homeland Security issued an advisory on June 22 saying ...

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