Domestic and International Terrorist Threats to the United States

Introduction and Historical Context

Americans have experienced terrorist attacks throughout the nation's history, with the September 11 attacks standing as the most significant. The United States has been a major target of both international terrorism and domestic terrorism. Terrorists and terrorist activity from certain nations—particularly countries in the Middle East—are far more likely to plan attacks on American citizens and territory than terrorists from other regions. Additionally, anti-American terrorist activity from particular overseas countries appears more frequent during certain periods than others.

Understanding these patterns requires examining the underlying causes of terrorism and its economic impact on the nation. By distinguishing between domestic threats such as drug cartel violence and transnational threats from organized terrorist organizations, policymakers can develop more targeted responses. Terrorism in the United States has evolved in both scope and character, requiring comprehensive analysis of its sources and consequences.

Theoretical Framework of Anti-American Terrorism

A rational theory of international terrorism contends that attacking overseas nationals provides calculated worth to terrorists by gaining political influence within their home countries. To attack foreigners is to become more appealing to domestic constituencies. Notably, there is an apparent connection between terrorists' home governments and their dependence on military support and aid from overseas countries.

Research on this relationship is illuminating: "Applied to the US case, our theory predicts that more anti-American terrorism emanates from countries that receive more US military aid and arms transfers and in which more American military personnel are stationed, all relative to the country's own military capacity" (Neumayer & Plumper, 2010, p. 3). Empirical approximations from a country dyad model covering the period of 1978 to 2005 support these theoretical predictions for both terrorist incidents targeting Americans and terrorist assassinations of Americans (Neumayer & Plumper, 2010).

Domestic versus Transnational Terrorism

This framework suggests that U.S. foreign military policy may inadvertently contribute to anti-American sentiment and radicalization in recipient countries, a counterintuitive but empirically supported finding.

Understanding the distinction between domestic and transnational terrorism is essential to assessing overall threats to U.S. security. While domestic terrorism—such as attacks by drug cartels and lone actors—presents serious challenges, transnational terrorism appears to have a greater adverse effect on economic growth. Major international attacks like September 11 have had larger economic impacts than domestic incidents such as the Boston Marathon bombing, though both represent significant security breaches.

Research by Enders, Sandler, and Gaibulloev (2011) reveals important spillover dynamics: "We find a large cross-correlation between domestic and transnational terrorist incidents that persists over a number of periods. A key finding is that shocks to domestic terrorism result in persistent effects on transnational terrorism; however, the reverse is not true" (p. 319). This finding suggests that domestic terrorism may escalate into transnational terrorism, meaning that countries like the United States cannot ignore domestic terrorist threats without risking international repercussions.

Sources and Methods of Terrorist Threat Identification

Domestic terrorism encompasses two distinct categories. One fuels international terrorism, as seen with terrorist networks in Afghanistan. The other occurs within American soil, exemplified by drug cartel violence along the U.S.-Mexico border. These separate but interconnected threats require different policy responses tailored to their unique drivers and manifestations.

Identifying terrorist threats requires understanding multiple intelligence sources and behavioral indicators. According to testimony from security experts, the primary threats to the United States include "the continued potential threat posed by al Qaeda, specifically its exploitation of the political and social turmoil created by the uprisings in the Arab world, and its inability to market its brand of jihad within the United States. Other threats addressed in the testimony include the resurgence of Iranian-sponsored terrorism, the increase in violence related to drug cartels in Mexico, the return of anarchism due to the continuing global economic crisis, and the potential increase in anti-Federal Government violence within the United States" (Jenkins, 2015).

Foreign terrorist threats originate primarily from ISIS and al Qaeda, exploiting regional upheaval and grievances in the Arab world, while domestic terrorist threats come from drug cartels increasing violence along the border and from radicalized individuals. The internet has become a critical tool for both terrorist recruitment and law enforcement monitoring. ISIS and other terrorist organizations actively share propaganda online to recruit would-be attackers. The U.S. government has responded by monitoring these websites and tracking users to assess whether terrorist plans will be carried out on American soil.

While racial profiling carries serious ethical and constitutional concerns, the geographic concentration of certain international terrorist threats in the Middle East has influenced law enforcement assessment methods. This is not to suggest that the U.S. government suspects all Middle Eastern individuals of terrorism, but rather that threat identification incorporates knowledge of where certain terrorist organizations operate and recruit. Internet monitoring provides objective intelligence that complements traditional investigation methods.

Conclusion

The threats associated with drug cartels stem from the need for these organizations to profit from illegal drug trade along the border. To minimize such threats, legalization of certain drugs like marijuana could reduce illegal distribution and undercut cartel revenues. To address domestic terrorism in more active regions like the Middle East, the United States might employ diplomatic organizations to help remove domestic terrorist threats rather than relying solely on military intervention. Although the U.S. government has deployed troops to Afghanistan, Iran, Iraq, and Jordan, these regions have not experienced decreases in terrorist activity. Therefore, diplomatic efforts may present a more effective solution than continued military presence.

Finally, improving mental health services can help address lone-actor domestic terrorism. Events like the Boston Marathon bombing, while often attributed to international influence, are also connected to mental health crises among U.S. citizens. A comprehensive approach combining diplomatic engagement, drug policy reform, and domestic social investment may be more effective than military or security measures alone.

Terrorist activity in the United States occurs more frequently than is acceptable. To reduce potential for international terrorist activity, increased diplomatic relations and reduction in weapons aid and weapons sales to terrorist-linked countries is strongly recommended. The American government can aid in reducing domestic terrorism by legalizing marijuana and improving mental health services for people more prone to violent acts. Threats to the United States exist both internationally and domestically. To reduce such occurrences, it is imperative that government implement actions that enable peaceful relations both internationally and on the domestic front.