What are sleeper cells, and how do they operate? Sleeper cells are spies or terrorists who operate in rival countries and remain inactive until they are essentially ordered to act.

Sleeper cells generally refer to foreign agents who lie low, going about their seemingly normal daily life, until called on to carry out a mission or attack.

Globalization extends the battlefields of regional wars to our own land and airspace — and Joe Biden’s lax border policies worsened the danger.

What have past attacks taught us? Identifying sleeper cells is extremely difficult. Walter pointed out that some individuals may be homegrown or enter the U.S. undetected. She noted that even when ...

The U.S. is on high alert after recent strikes on Iran’s nuclear facilities, with the Department of Homeland Security warning of a heightened threat environment. NBC News reported that Iran ...

ICE Arrests 11 Iranians As Sleeper Cell Threat 'Never Higher,' Feds Say A sniper. A convicted felon with Hezbollah ties. A U.S. citizen who allegedly threatened to shoot ICE officers. These are just ...

Those in sleeper cells may live normal lives until triggered to act violently.

Federal Officials Warn Sleeper Cell Threat In US 'Never Been Higher' Federal officials are warning that the threat of Iranian sleeper cells inside the United States has surged following US military ...