Nearly twenty-five years after the terrorist attacks of September 11, 2001, the United States still lives with the central lesson of that day: threats that develop overseas do not stay overseas. Terrorist networks that begin as distant regional conflicts can eventually reach American soil. The nearly 3,000 lives lost on 9/11 were a tragic reminder that ignoring or underestimating those threats can have catastrophic consequences.
Preventing another attack of that magnitude requires a willingness to confront the regimes and networks that enable terrorism long before they strike. In today’s geopolitical landscape, one of the most consequential actors in that system is the Islamic Republic of Iran.
For decades, Iran has been identified by U.S. policymakers as a central sponsor of militant and terrorist groups across the Middle East. These networks operate as proxies, armed organizations that receive funding, weapons, and training from Tehran while carrying out operations across the region. The model allows Iran to project influence and challenge its adversaries while avoiding direct confrontation. This system of proxy warfare has become a defining feature of Iran’s regional strategy.
The United States has long viewed Iran as a significant foreign policy challenge. American officials have warned for decades that Iran’s support for militant groups and destabilizing regional activities pose risks not only to Middle Eastern stability but also to U.S. national security interests.
Understanding the danger of this strategy requires looking beyond individual terrorist organizations. What makes the Iranian model unique is the infrastructure that supports it: training networks, funding channels, ideological alliances, and military coordination across multiple countries. This system allows militant groups to operate with a level of resources that would otherwise be impossible for non-state actors.
History demonstrates why such systems must be confronted early. Terrorist threats rarely emerge overnight. They grow slowly, expanding through recruitment, financing, and ideological indoctrination until they eventually reach operational capability. The networks responsible for the September 11 attacks spent years developing infrastructure across several countries before carrying out their assault on the United States.
The central lesson of 9/11 is clear: waiting until threats materialize at home is too late.
Recent events inside the United States should serve as a warning. The attempted terrorist attack near New York City’s Gracie Mansion, the attempted ramming of a Nevada power substation, and the deadly vehicle ramming attack in New Orleans are reminders that the early stages of extremist violence are often visible long before catastrophe occurs. These incidents may appear isolated or small in scale compared with the devastation of 9/11, but history teaches us that early warning signs often look exactly like this.
In the years before September 11, the United States experienced a series of attacks that many policymakers treated as contained events rather than signals of a growing threat. The first bombing of the World Trade Center in 1993 killed six people and injured more than a thousand. The 1996 bombing of the Khobar Towers housing complex in Saudi Arabia killed 19 American service members. In 1998, coordinated bombings of U.S. embassies in Kenya and Tanzania killed more than 200 people.
Each attack was tragic. Each prompted investigations and tactical responses. But collectively they represented a pattern that was not fully confronted until it culminated in the attacks of September 11.
We cannot allow today’s warning signs to become tomorrow’s prelude. Treating incidents such as the attempted attacks in New York and Nevada or the vehicle ramming in New Orleans as isolated crimes rather than potential indicators of broader extremist networks risks repeating the same mistake that preceded 9/11. Early disruptions are not evidence that the threat is small, they are evidence that it exists.
News reports now suggest U.S. intelligence has intercepted encrypted Iranian messages that may be an “operational trigger” for “sleeper assets.”
The lesson is simple: prevention is far more effective than reaction.
A policy brief published by the George W. Bush Institute emphasizes that Iran’s leadership views confrontation with the United States and the West as central to its revolutionary ideology. The regime has consistently pursued policies designed to weaken Western influence while expanding its own regional power through military proxies and asymmetric warfare.
The brief also notes that Iran’s relationships with militant organizations and extremist actors have helped create a network of instability that stretches across the Middle East. These connections have enabled Tehran to influence conflicts in multiple countries simultaneously, turning localized crises into broader geopolitical challenges.
This strategy poses several dangers.
First, proxy networks increase the likelihood of escalation. When militant groups operate with state support, their capacity for violence expands significantly. They gain access to weapons systems, intelligence resources, and logistical networks that ordinary terrorist groups could never sustain on their own.
Second, proxy warfare blurs accountability. Governments that sponsor militant groups can deny responsibility for attacks carried out by those groups, complicating diplomatic and military responses.
Third, these networks can eventually evolve beyond their original regional objectives. Groups that initially target local adversaries often broaden their ambitions as they gain strength and legitimacy.
This dynamic is precisely why American counterterrorism strategy has increasingly focused on disrupting networks rather than merely responding to attacks.
Critics argue that confronting Iran risks further destabilizing an already volatile region. That concern deserves serious consideration. War should never be undertaken lightly, and the costs of military conflict, both human and economic, are immense.
But history also warns of the consequences of inaction.
The attacks of September 11 occurred in part because terrorist organizations were allowed to operate and expand in environments where they faced little meaningful resistance. Safe havens allowed them to train recruits, develop operational plans, and refine their ideology.
When such networks receive support from governments, the threat becomes even more dangerous.
Iran’s broader geopolitical ambitions also extend beyond terrorism alone. Concerns about its nuclear program have been a central issue in international diplomacy for more than two decades. In 2002, revelations that Iran had been secretly enriching uranium triggered global alarm about the possibility that Tehran could eventually develop nuclear weapons.
The combination of militant proxy networks and potential nuclear capability represents a scenario that many national security experts consider unacceptable.
None of this means that military confrontation is the only solution. Diplomatic engagement, economic sanctions, intelligence operations, and international alliances all play critical roles in countering threats posed by hostile regimes.
In fact, the history of U.S.–Iran relations shows that both confrontation and diplomacy have been attempted repeatedly. After the September 11 attacks, American and Iranian diplomats even cooperated briefly on efforts to stabilize Afghanistan, demonstrating that engagement is sometimes possible despite deep political differences.
But diplomacy alone cannot succeed if the underlying networks that support terrorism remain intact.
Ultimately, the question facing the United States is not whether confrontation carries risks. Every foreign policy decision carries risks. The real question is whether failing to confront threats early creates even greater dangers later.
The memory of 9/11 offers a sobering answer.
Preventing another catastrophic attack on American soil requires vigilance, resolve, and a willingness to disrupt the systems that enable terrorism. That means confronting not only individual terrorist groups but also the state sponsors and networks that sustain them.
Twenty-five years ago, the United States promised to “never forget.” Honoring that promise requires more than remembrance. It requires the determination to act before the next tragedy occurs.
References
- U.S. Department of State. United States Policy Toward Iran. Washington, DC: U.S. Department of State; 2005.
- George W. Bush Presidential Center. Iran: Initial Observations. Dallas, TX: George W. Bush Institute; 2024.
- National Security Archive. Documenting Iran–U.S. Relations, 1978–2015. George Washington University; 2019.
- EBSCO Research Starters. Iran Nuclear Crisis Chronology. 2024.
- PBS NewsHour. Timeline of U.S.–Iran Relations. 2020.
