The Department of Homeland Security just lit the flare. A fresh National Terrorism Advisory went live on June 22, warning of a “heightened threat environment” across the United States. The trigger? U.S. airstrikes on Iran’s nuclear sites and the fallout that followed. Tehran is furious. Its proxies are mobilizing. And now, the threat matrix includes American soil.
The bulletin doesn’t hedge. It names Iran and its network of proxy groups. It cites the potential for cyberattacks, lone-wolf violence, and coordinated plots. The advisory runs through September 22. That’s a full 90-day window of elevated alert. DHS says the risk of domestic attacks will spike if Iran’s leadership issues a religious ruling calling for retaliation. That’s not a hypothetical. That’s a pattern.
The warning comes on the heels of Operation Midnight Hammer. U.S. bombers hit Fordow, Natanz, and Isfahan with bunker-busting payloads. The Pentagon says the strikes were a success. Iran says the war just started. Within hours, Iranian officials vowed revenge. Within days, U.S. intelligence picked up chatter from militias in Iraq and Syria. The targets? American bases. The timeline? Imminent.
🚨 🚨 BREAKING: Department of Homeland Security releases a National Terrorism Advisory, warning of possible attacks by Iran or its proxy groups in the United States. pic.twitter.com/59w3b0C2pY
— Maine (@TheMaineWonk) June 22, 2025
🚨 NATIONAL SECURITY ALERT
BREAKING: U.S. intelligence officials now confirm Iran-backed militias are preparing to launch attacks on American bases in Iraq and possibly Syria. But the threat isn’t just abroad.
The Department of Homeland Security has issued a rare National…
— Brian Allen (@allenanalysis) June 22, 2025
But the threat isn’t just overseas. DHS says Iranian-backed actors have already attempted attacks inside the U.S. since 2020. Some were disrupted. Some got close. The bulletin notes that “multiple potentially lethal Iranian-backed plots” have been stopped in recent years. It also warns that anti-Semitic and anti-Israel sentiment could fuel domestic violence. That’s not theory. That’s precedent.
Cyber is part of the playbook. DHS expects low-level attacks from pro-Iranian hacktivists. Think denial-of-service floods, data leaks, and infrastructure probes. But the real concern is state-linked actors. Iran’s Cyber-Electronic Command and affiliated groups like Cyber Av3ngers have already breached U.S. water systems and energy networks. They’ve used AI tools to spread disinformation. They’ve impersonated Israelis online to demoralize Jewish communities. The tools are in place. The intent is clear.
Former FBI officials are sounding the alarm. Kash Patel’s team says they’re struggling to locate Iranian sleeper cells. Thousands of Iranian nationals have crossed the southern border in the last three years. The vetting backlog is real. The intelligence gaps are wider than anyone wants to admit. And now, the stakes are higher.
Sources:
https://www.dhs.gov/ntas/advisory/national-terrorism-advisory-system-bulletin-june-22-2025
https://sports.yahoo.com/open-borders-under-biden-could-203927546.html