Sleeper cells and threat warnings: how the US-Iran conflict is spinning up fear

The Trump administration’s attacks on Iran targeted a nuclear facility in Isfahan, shown at right. Composite: Getty Images, Maxar via EPA

As the war between Iran and Israel intensified, teasing the eventual involvement of the US military, American security agencies began to warn of a looming threat of Tehran-backed “sleeper cells” known to be active stateside that could be called in for retaliatory attacks.

But as the B-2 bombers struck nuclear sites across Iran and the Iranian military responded with a missile barrage on US bases in the region, a ceasefire took shape. In the end, the Islamic Revolutionary Guard Corps (IRGC) – Iran’s elite military and intelligence branch, wielding a global web of terrorist groups and agents acting on its behalf – didn’t appear to sponsor or carry out any covert operations inside the US, nor has it since.