The FBI, Secret Service, and Capitol Police are operating at heightened security levels following the U.S. and Israeli military strikes on Iran that began in late February 2026, with federal law enforcement bracing for potential retaliatory attacks on American soil. FBI Director Kash Patel placed the bureau’s counterterrorism and counterintelligence teams on high alert on February 28, ordering Joint Terrorism Task Forces nationwide to work around the clock, while the Secret Service bolstered its presence around the White House, former presidents’ residences, and other protected sites. The security escalation comes just days after an armed intruder was shot and killed at Mar-a-Lago, underscoring how real the physical threat landscape has become for senior government officials and protected locations.
This rapid mobilization across multiple federal agencies reflects a security posture not seen since the immediate aftermath of major geopolitical escalations in recent memory. The coordinated response involves not just the headline agencies but also the Department of Homeland Security, the State Department, Washington D.C. Metropolitan Police, and the NYPD, all working in tandem to identify and disrupt threats before they materialize. This article examines the specific measures each agency is taking, the intelligence picture driving these decisions, the Mar-a-Lago breach that preceded the Iran crisis, and what experts say about the realistic threat of retaliation against U.S. targets — including cyberattacks and direct action against high-profile officials.
Table of Contents
- Why Are the FBI, Secret Service, and Capitol Police on High Alert for Iranian Retaliation?
- The Mar-a-Lago Security Breach That Put Everyone on Edge
- The State Department’s Worldwide Caution and What It Signals
- How Federal Agencies Coordinate During a Multi-Threat Environment
- The Cyber Threat That Could Hit Before Any Physical Attack
- The “Death Ground” Warning From Military Experts
- What Comes Next in the Threat Landscape
- Conclusion
- Frequently Asked Questions
Why Are the FBI, Secret Service, and Capitol Police on High Alert for Iranian Retaliation?
The short answer is that a military conflict with iran creates an immediate and well-documented risk of retaliatory action against the U.S. homeland. Iran has a long history of using proxy networks and intelligence operatives to plan attacks abroad, and federal law enforcement agencies are treating the current moment as one requiring maximum vigilance. FBI Director Kash Patel’s directive on February 28 was specific — he instructed teams to “mobilize all assisting security assets needed” and confirmed that the bureau’s Joint Terrorism Task Forces across the country are now operating on a 24/7 basis “to address and disrupt any potential threats to the homeland.” In New York, the FBI and NYPD Joint Terrorism Task Force have been monitoring pro-Iran groups active on social media that were praising Iran’s response and urging supporters to mobilize. Officials described this rhetoric as “hostile but not yet operational,” a distinction that matters enormously in counterterrorism work.
There is a significant gap between online cheerleading for a foreign adversary and actual operational planning for an attack, but that gap can close quickly, which is precisely why the task forces are watching in real time. As of February 28, no specific, credible threats against U.S. targets had been identified, but the absence of a known plot does not mean the absence of risk. The Secret Service, for its part, announced it is “actively monitoring the situation in Iran and remains in close coordination” with federal and local partners. The agency warned that members of the public may notice an increased law enforcement presence around protected sites, including the White House and the homes of former presidents. This is not unusual during periods of elevated geopolitical tension, but the scale and speed of the response signal that intelligence agencies view the threat as serious enough to warrant visible deterrence measures, not just behind-the-scenes monitoring.
The Mar-a-Lago Security Breach That Put Everyone on Edge
The Iran-related security escalation did not happen in a vacuum. Just one week earlier, on February 22, 2026, Secret Service agents and a Palm Beach County deputy sheriff shot and killed 21-year-old Austin Tucker Martin of North Carolina after he breached the secure perimeter at Mar-a-Lago at approximately 1:30 a.m. Martin was carrying a shotgun and a gas can. When ordered to drop the items, he set down the gas can but raised the shotgun to a shooting position, prompting agents to open fire. President trump was not at Mar-a-Lago at the time — he was in Washington attending the White House Governors Dinner — but the incident sent shockwaves through the protective security community. The FBI is leading the investigation into Martin’s background and motive, and as of late February, no definitive explanation for the breach had been made public.
However, the timing matters. A physical breach of one of the most heavily guarded private residences in the country, followed days later by a military escalation that experts say could provoke retaliatory strikes against senior U.S. officials, creates a compounding security challenge. Agencies that were already reassessing perimeter security at Mar-a-Lago now have to layer in an entirely different threat profile from a state actor with known capabilities for overseas operations. It is worth noting a limitation here: not every security incident is connected, and there is no public evidence linking Martin’s breach to any foreign government or organized group. However, when threat assessments are conducted, the cumulative picture matters. A successful perimeter breach at a presidential property — regardless of the intruder’s motive — exposes vulnerabilities that adversaries with far greater resources could potentially exploit.
The State Department’s Worldwide Caution and What It Signals
The U.S. Department of State re-activated its “Worldwide Caution” advisory following the strikes on Iran, warning American citizens to exercise increased vigilance in all countries due to the heightened risk of retaliatory violence. This is one of the broadest alerts the State Department can issue, and it signals that the government believes the threat is not confined to the Middle East or to military targets. American civilians abroad — tourists, business travelers, students, expatriates — are being told to stay alert. Washington, D.C.
Metropolitan Police stated they are closely monitoring events and coordinating with local, state, and federal partners, though at the time of the announcement, no known threats to the capital had been identified. For D.C. residents and visitors, this means a heightened police presence near government buildings, embassies, and landmarks that could be symbolic targets. The Capitol Police, which is responsible for protecting Congress and the Capitol complex, operates under similar protocols during periods of elevated threat, increasing screening, patrols, and coordination with intelligence agencies. The Worldwide Caution advisory is notable because it represents the diplomatic establishment’s assessment that this is not a contained military operation with limited blowback risk. When the State Department tells every American everywhere to be more careful, that is an institutional acknowledgment that the retaliatory threat is diffuse and hard to predict — a message that aligns with what counterterrorism experts have been saying publicly.
How Federal Agencies Coordinate During a Multi-Threat Environment
The current security posture requires coordination across agencies that have different missions, different legal authorities, and different operational cultures. The FBI’s Joint Terrorism Task Forces are the primary vehicle for domestic counterterrorism intelligence sharing, bringing together federal agents with state and local police officers who have street-level knowledge of their communities. The Secret Service focuses on protective intelligence — identifying specific individuals or groups that pose a threat to the people and places it is charged with defending. Capitol Police handle the legislative branch. DHS oversees border security, cybersecurity, and infrastructure protection. Getting all of these entities pulling in the same direction during a fast-moving crisis is neither automatic nor easy. One of the tradeoffs in this kind of elevated posture is between visible security and intelligence collection. A heavy, visible law enforcement presence around the White House or the Capitol can deter an attack, but it can also push adversaries to change their plans, move to softer targets, or go further underground, making them harder to track.
Intelligence agencies generally prefer to monitor threats quietly so they can identify networks and disrupt plots before they reach the operational stage. When the Secret Service announces that the public should expect to see more agents and officers, that is a calculated decision that the deterrent value outweighs the surveillance cost. It also serves a public communication purpose — reassuring citizens that the government is taking the threat seriously. The comparison to previous escalations is instructive. After the January 2020 U.S. strike that killed Iranian General Qasem Soleimani, a similar security mobilization occurred. Ultimately, Iran responded with a ballistic missile strike on U.S. forces in Iraq rather than with terrorist attacks on the homeland. But the current situation involves a far more extensive military campaign, and experts say the calculus for retaliation may be different this time.
The Cyber Threat That Could Hit Before Any Physical Attack
Experts have specifically warned that Iran is likely to attempt cyberattacks against U.S. targets, testing DHS, the private sector, and the country’s cyber defenses. This is not speculative — Iran has a well-documented history of state-sponsored cyber operations, including attacks on U.S. financial institutions, attempts to breach water treatment facilities, and disinformation campaigns targeting elections. In a scenario where Iran’s conventional military options are severely degraded by U.S. and Israeli strikes, cyber operations become one of the most accessible asymmetric tools available.
The warning about cyberattacks is important because the targets may not be what most people expect. While government networks are hardened and actively defended, critical infrastructure operated by private companies — energy grids, water systems, hospitals, financial networks — represents a much softer target set. A successful cyberattack on a regional power grid or a major hospital system could cause significant disruption and public fear without requiring any operative to set foot on American soil. DHS’s Cybersecurity and Infrastructure Security Agency, known as CISA, has been issuing advisories to critical infrastructure operators, but the reality is that many smaller utilities and local government systems remain under-resourced and under-prepared for state-level cyber threats. There is an important limitation to acknowledge: attribution in cyberattacks is often slow and contested. Even if a significant cyber incident occurs in the coming weeks, it may take months to definitively attribute it to Iran, and Tehran will almost certainly deny involvement. This ambiguity is part of what makes cyber operations attractive to state actors — they offer plausible deniability that a car bomb or an assassination attempt does not.
The “Death Ground” Warning From Military Experts
A former NATO commander publicly warned that Iran is now on “death ground” — a military term drawn from Sun Tzu describing a situation where a force faces existential threat and has no option but to fight with everything it has. The argument is that the U.S. and Israeli military campaign has put the Iranian regime in a position where restraint may not be in its interest, because the strikes are already threatening its survival. Under this logic, Iran could “go big” in retaliation, potentially targeting President Trump and other top U.S. officials directly, rather than limiting its response to proxy attacks or symbolic gestures.
This assessment, if accurate, puts extraordinary pressure on the FBI, Secret Service, and Capitol Police. Protecting against a determined state actor willing to accept catastrophic consequences is a fundamentally different challenge than protecting against a lone wolf or a small terrorist cell. It demands intelligence cooperation with allied nations, hardened physical security at every protected site, and the kind of sustained operational tempo that grinds down even the best-resourced agencies over time. Whether Iran actually has the capability to carry out a high-profile assassination on U.S. soil is debatable, but the fact that senior military analysts are raising the possibility publicly means the protective agencies must plan as if it is real.
What Comes Next in the Threat Landscape
The trajectory of the security situation depends almost entirely on what happens in the military campaign and whether any diplomatic off-ramp emerges. If strikes continue and intensify, the probability of some form of retaliatory action — whether cyber, kinetic, or through proxy forces — increases with each passing week.
Federal law enforcement agencies can maintain a heightened posture for a period, but sustained 24/7 operations across every Joint Terrorism Task Force in the country are resource-intensive and cannot continue indefinitely without degrading other law enforcement priorities. The coming weeks will be a critical test of whether the post-9/11 counterterrorism infrastructure — the JTTFs, the fusion centers, the interagency coordination mechanisms — can adapt to a threat that combines state-sponsored terrorism risk, cyber warfare, and lone-wolf radicalization driven by online rhetoric. For the American public, the most practical takeaway is straightforward: the threat is being taken seriously at every level of government, visible security measures are a sign of preparedness rather than panic, and vigilance from ordinary citizens — reporting suspicious activity, staying informed, and following State Department advisories when traveling — remains a meaningful part of the national defense posture.
Conclusion
The simultaneous high-alert status across the FBI, Secret Service, and Capitol Police reflects a genuine and multi-dimensional threat environment created by the U.S. military strikes on Iran. From Director Patel’s order for round-the-clock JTTF operations to the Secret Service’s visible reinforcement of the White House and former presidents’ homes, from the State Department’s Worldwide Caution to the monitoring of pro-Iran social media activity in New York, the federal response is broad and coordinated. The Mar-a-Lago breach on February 22 adds an additional layer of urgency, demonstrating that even the most protected sites can face physical incursion. The question now is not whether Iran will attempt retaliation — most experts consider some form of response virtually certain — but what form it will take and whether U.S.
defenses can intercept it. Cyberattacks are the most likely near-term vector, followed by potential proxy operations overseas and, in the most extreme scenarios, direct action against U.S. officials. Federal agencies are postured to detect and disrupt these threats, but no security apparatus is perfect, and the sustained nature of the current crisis means that vigilance must be maintained not just for days but potentially for months. For Americans at home and abroad, staying informed through official channels and reporting anything suspicious to local law enforcement or the FBI’s tip line remains the most useful individual action.
Frequently Asked Questions
Has the FBI identified any specific threats against U.S. targets related to Iran?
As of February 28, 2026, no specific, credible threats against U.S. targets had been identified. FBI Director Kash Patel placed counterterrorism teams on high alert as a precautionary measure, and Joint Terrorism Task Forces nationwide are operating 24/7 to detect and disrupt any emerging threats.
Was President Trump at Mar-a-Lago when the armed intruder was shot?
No. President Trump was in Washington, D.C. attending the White House Governors Dinner at the time of the February 22 breach. The intruder, 21-year-old Austin Tucker Martin of North Carolina, was carrying a shotgun and a gas can and was killed after he raised the weapon toward Secret Service agents.
What is the State Department’s Worldwide Caution advisory?
The Worldwide Caution is one of the broadest alerts the State Department can issue. It warns all American citizens in every country to exercise increased vigilance due to a heightened risk of retaliatory violence. It was re-activated following the U.S. and Israeli military strikes on Iran.
What kind of cyberattacks could Iran launch against the U.S.?
Iran has a documented history of state-sponsored cyber operations targeting U.S. financial institutions, water treatment facilities, and election infrastructure. Experts warn that critical infrastructure operated by private companies — energy grids, hospitals, financial networks — may be particularly vulnerable because many smaller systems lack the resources to defend against state-level threats.
Why are experts calling Iran’s situation “death ground”?
The term comes from Sun Tzu’s military theory and describes a force facing existential threat with no option for retreat. A former NATO commander used it to describe Iran’s position under the current U.S. and Israeli military campaign, warning that a cornered regime may choose to “go big” in retaliation rather than exercise restraint, potentially targeting senior U.S. officials directly.