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How to Lower the Risk of New Terror Strikes by Border-Crossing Islamist Extremists

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U.S.-bound Mauritanian migrants in Costa Rica near the Nicaraguan border. 2022 Photo by Todd Bensman.

From the Center for Immigration Studies

By Todd Bensman

So a border-crossing illegal immigrant has finally conducted a terror attack just as the FBI Director and the U.S. intelligence community has warned with increasing frequency would happen because of a 2021-2024 mass migration border crisis the New York Times recently concluded was the “largest in U.S. history”, fomented by policies of the Joe Biden administration.

Mauritanian national Sidi Mohammad Abdallahi, who illegally crossed the southern border during it in March 2023, entered the U.S. history books October 26 as the first to validate the long-hypothesized border terror infiltration threat with an attempt to massacre Jews and police in Chicago – as detailed in Part 1 and Part 2 of this “First Blood” series.

Now what? How might the incoming second administration of President Donald Trump reduce the threat of more such attacks with millions of foreign strangers already inside the United States and more constantly trying the southern land border?

Following are some remedies, starting with a highly viable one that comes from a most unexpected quarter, the Democratic administration of President Barack Obama and perhaps best frames where many solutions must aim: a category of illegal aliens the government has long termed “special interest aliens (SIAs)” or variations thereof, for hailing from countries where Islamist terrorist groups operate.

In June 2016, Obama’s DHS Secretary, Jeh Johnson, issued a three-page unclassified memorandum titled “Cross-Border Movement of Special Interest Aliens“. It ordered DHS border security and immigration agency directors to develop a concerted, whole-of-government initiative that would more robustly apply security vetting to SIA border-crossers and much more.

DHS Secretary Jeh Johnson’s 2016 Memo on Special Interest Aliens.

Since 2004 in the aftermath of 9/11, the U.S. Border Patrol and the US intelligence community came up with the SIA category tag to slap on apprehended illegal aliens who hailed from 35 mostly Muslim majority “countries of interest” where Islamist extremism and terrorist groups operated. Mauritania has long been on the intelligence community-created list, and Abdallahi therefore was an SIA.

The SIA tag didn’t mean the aliens were actual terrorists, of course, just that FBI or qualified intelligence officers would take a good, hard look at each to make sure they weren’t. To do that, agents endeavored to conduct intensive in-person interviews with them in detention centers, go through pocket trash and phones, and maybe check with amenable foreign intelligence agencies, looking for terrorism indicators that might weed out for deportation any who turned up as problematic.

Something related to “the increased global movement of SIAs” Johnson mentioned in the memo had clearly spooked him in 2016, perhaps the Muslim immigrants then pouring over European Union border in a mass migration surge, among them some who conducted attacks across the continent. (See: What Terrorist Migration Over European Borders Can Teach About American Border Security.) Perhaps he worried that the SIA security vetting program had fallen into dangerous disrepair a dozen years into it.

“As we all appreciate, SIAs may consist of those who are potential national security threats to our homeland”, the secretary wrote in the 2016 memo. “Thus the need for continued vigilance in this particular area.”

Whatever it was, the Johnson memo demanded the “immediate attention” of underlings to form a “multi-DHS Component ‘SIA Joint Action Group.’” The memo outlined plan objectives. Intelligence collection and analysis, Johnson wrote, would drive efforts to “counter the threats posed by the smuggling of SIAs.” Coordinated investigations would “bring down organizations involved in the smuggling of SIAs into and within the United States”, he wrote.

Border and port of entry operations capacities would “help us identify and interdict SIAs of national security concern who attempt to enter the United States” and “evaluate our border and port of entry security posture to ensure our resources are appropriately aligned to address trends in the migration of SIAs.”

The Obama administration’s SIA initiative never fully developed before Donald Trump took office in January 2017 and was soon lost in the shuffle, even though the old unreformed SIA vetting program remained in place, its FBI interviewers supplemented by specially trained agents of a U.S. Customs and Border Patrol unit called Tactical Terrorism Response Teams (TTRTs) working ICE facilities.

But the Trump administration should resurrect the Johnson idea because an SIA action task force has never been needed more than now, both at the border and in the interior, with so many SIAs like Abdallahi now living inside the country with virtually no vetting beyond largely ineffective database biometrics checks before release.

A Counterterrorism Program Swamped to Oblivion

Johnson was considering the idea at a time when perhaps 3,000-4,000 SIAs per year were apprehended at the border on average. (See: Terrorist Infiltration Threat at the Southwest Border.)

But today, the SIA vetting program is all but nonexistent, swamped to oblivion by the epic Biden-era mass migration crisis that brought in tens of thousands of SIAs per year, including at least 400 \who were on the FBI’s terrorism watch list by the end of 2024. A majority are thought to have traveled from South American landing countries through the Colombia-Panama “Darien Gap” migration passage where enabling governments have facilitated northward passages by bus through to Nicaragua.

Under no circumstance could responsible agencies possibly interview and investigate more than a miniscule fraction of them. It is almost certain that Abdallahi did not undergo a face-to-face interview with a trained federal agent before he was released to go to Chicago.

Indeed, data leaked to the media shows that nearly 75,000 SIAs reached the southern border between October 2022 and August 2023. Another 30,000 SIAs entered in the following 15 months through February 2024, the Daily Caller reported. The Biden DHS responded by reducing the number of SIA countries from 35 to about 13 (still including Mauritania), another House Judiciary Subcommittee report said.

A Biden-era cell phone app-based parole scheme (CBP One) gave thousands more SIAs from two dozen of the countries permission to cross the border on legally questioned mass humanitarian parole with ineffective security vetting. (See: Thousands of ‘Special Interest Aliens’ Posing Potential National Security Risks Entering via CBP One App.) Among them were some Tajikistanis arrested in a multi-state FBI counterterrorism wiretap sting in three cities. (See: After Suspected Tajik Terrorist Arrests, Little-Known Biden Border Entry Program Demands Hard Focus.)

Far from able to interview these overwhelming thousands, every federal agent assigned to the border was so swamped that at least 99 illegal aliens who were on the terrorism watch list were accidentally released, an August 2024 House Judiciary Committee report said.

Key Recommendations

These facts present an argument for the incoming Trump administration’s DHS to follow through on Johnson’s idea to establish an aggressive SIA action task force that can quickly assess and oversee the resurrection of a more thorough, well-resourced vetting program at the land borders as other policies reduce overall migration flow to pre-Biden numbers. But that’s only a start to onboard other remedies that will reduce the current heightened risk from unvetted SIAs. Other high-priority solutions are as follows:

At the land borders

  • Restore the list of SIA countries to prior lengths; prioritize and resource federal personnel to conduct enhanced in-person vetting inside detention centers with a goal of 100 percent while more emphatically exploiting and enhancing the capabilities of the National Vetting Center (NVC) to assist in detecting derogatory information. (President Trump originally established the NVC, which the Biden administration maintained.) Consider the use of state and local fusion center officers and analysts as trusted partners to conduct vetting in detention centers under section 103 (a)(10) of the Immigration and Nationality Act (INA), which allows the federal use of state and local police resources. Encourage a congressional oversight responsibility with annual reporting requirements to ensure the SIA counterterrorism enterprise at the borders remains impactful, updated, and appropriately resourced.
  • Institute extended detention time and misdemeanor federal prosecution for illegal entry by SIAs and discourage any availability of bond-outs for SIAs; ensure that bed space availability is always commensurate with average SIA apprehension rates so that room is consistently available for detention times necessary for security screening, investigative efforts, court proceedings, or final removals.

In the U.S. interior

  • Convene regional ICE task forces that will compile databases of SIAs released into the United States since January 2021 under Biden-era policies and parole programs and require them to undergo belated enhanced security screenings, to include interviews, that were not previously conducted when they were released. Officers would act on derogatory information from abroad but also any uncovered during U.S. residency.
  • Prioritize and resource asylum fraud investigations of SIAs by empowering officers of the Fraud, Detection and National Security Directorate (FDNS) of U.S. Citizenship and Immigration Services (USCIS) to conduct forensic analyses of random samples of asylum claims by SIAs. Grant FDNS agents arrest and investigative referral authorities independent of any other agency, including ICE. Substantially increase FDNS investigative staff and train USCIS’s asylum officer corps to conduct national security vetting during the “credible fear” interview process in synchronicity with routine duties.
  • Have the Attorney General direct U.S. Attorneys to accept and prioritize asylum fraud case prosecutions and referrals from the newly empowered FDNS officer corps, resolving Government Accountability Office reporting in recent years that shows U.S. Attorneys reject most asylum fraud referrals.
  • Direct appropriate law enforcement agencies to investigate and prosecute U.S.-based individuals who encourage, induce, or directly fund the illegal cross-border smuggling of SIAs, for deterrent effect, under Section 274 (A)(1)(IV) of the Immigration and Nationality Act.

Abroad

  • Fully collaborate with the new Panamanian government in its plan to close the Darien Gap, through which many SIAs travel, by funding highly deterring, large-scale foreign repatriation flights to home countries and local detention facilities as needed. Provide aircraft as necessary. Furthermore, require large-scale repatriation flight programs in Colombia and Costa Rica. Consider funding repatriation flights from Mexico. Apply diplomatic pressure as appropriate on recalcitrant home nations to accept the flights.
  • Create a contingency plan to implement “offshore” asylum processing centers in countries of transit and origin, in conjunction with US-funded foreign air repatriation programs.
  • Increase the number of American law enforcement screeners able to interview SIAs in detention facilities of Mexico, Honduras, Panama, Brazil, and other Latin American countries known for the staging and transit of SIAs.
  • Direct and prioritize a surge of SIA smuggling investigations in Latin America by ICE Homeland Security Investigations (HSI); ensure more HSI units target SIA smuggling as a larger percentage of total crime categories in South America, Central America, and in Mexico.
  • Use all tools of government power to ensure that the governments of Mexico, Guatemala, Belize, Ecuador, and (eventually) Cuba more robustly monitor, vet, audit, investigate, and prosecute corrupt practices within their consulates and embassies in countries of national security interest as a means to reduce wrongful issuances of visas.

Managing down the risks associated with SIA flows and detection of terrorism-minded immigrants within them, of course, gets easier when other deterrence policies reduce the overall numbers. Finding needles is easier when the haystacks are small.

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illegal immigration

National Guardsmen arrive in response to LA’s ‘violent mobs’

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Demonstrators bearing a sign for the Coalition for Humane Immigrant Rights march in downtown Los Angeles on June 6, 2025 in response to federal immigration enforcement operations. Photo: Anthony Cabassa.

From The Center Square

By 

National Guard troops arrived Sunday morning in downtown Los Angeles after more violence erupted overnight during the weekend’s riots.

A crowd threw lit fireworks and other objects Saturday night at federal detention officers standing in a line on Alameda Street near the Metropolitian Detention Center in Los Angeles, as seen in televised reports by local media. The officers wore armor, face shields and gas masks. Los Angeles police and the Los Angeles County Sheriff’s Office arrived later.

In response to earlier “violent mobs” attacking Immigration and Customs Enforcement officers in Los Angeles, the White House announced Saturday evening that the president was deploying 2,000 National Guardsmen in response to the violence. Members of the National Guard arrived around 4 a.m. local time Sunday, according to media reports.

Multiple videos circulated Saturday on social media showing stones being thrown at a convoy of ICE vehicles through the streets of Paramount, minutes from downtown Los Angeles. Another video appears to show a mob surrounding a federal law enforcement bus.

In a late-night statement Saturday, White House Press Secretary Karoline Leavitt said President Donald Trump has signed a Presidential Memorandum deploying 2,000 National Guardsmen to “address the lawlessness that has been allowed to fester.” She pointed fingers at California’s Democratic leadership for allowing the violence to continue.

“In recent days, violent mobs have attacked ICE Officers and Federal Law Enforcement Agents carrying out basic deportation operations in Los Angeles, California. These operations are essential to halting and reversing the invasion of illegal criminals into the United States. In the wake of this violence, California’s feckless Democrat leaders have completely abdicated their responsibility to protect their citizens,” Leavitt stated.

The press secretary underscored the administration’s commitment to restoring law and order while sending a clear signal that suspected attackers will be brought to justice.

“The Trump Administration has a zero tolerance policy for criminal behavior and violence, especially when that violence is aimed at law enforcement officers trying to do their jobs. These criminals will be arrested and swiftly brought to justice. The Commander-in-Chief will ensure the laws of the United States are executed fully and completely,” she concluded.

The violent eruptions come a day after Los Angeles Mayor Karen Bass released a statement reiterating the city’s sanctuary status, adding that the city won’t stand for immigration enforcement.

“This morning, we received reports of federal immigration enforcement actions in multiple locations in Los Angeles. As Mayor of a proud city of immigrants, who contribute to our city in so many ways, I am deeply angered by what has taken place. These tactics sow terror in our communities and disrupt basic principles of safety in our city. My Office is in close coordination with immigrant rights community organizations. We will not stand for this,” Bass stated.

In response, FBI Director Kash Patel reposted the mayor’s statement on X, simply saying, “We will.”

Patel reiterated in another social media post on Saturday night that anyone engaging in violent acts would be arrested, indicating federal law enforcement would protect ICE officers.

“Hit a cop, you’re going to jail … doesn’t matter where you came from, how you got here, or what movement speaks to you. If the local police force won’t back our men and women on the thin blue line, we [the] FBI will,” Patel posted on X.

Gov. Gavin Newsom reacted to the National Guard deployment with a post on X.

“The federal government is taking over the California National Guard and deploying 2,000 soldiers in Los Angeles — not because there is a shortage of law enforcement, but because they want a spectacle,” Newsom said. “Don’t give them one. Never use violence. Speak out peacefully.”

The violent uprising in Los Angeles comes days after minority leader Rep. Hakeem Jeffries, D-N.Y., demanded that ICE agents should be unmasked and their identities revealed, comparing them to the Soviet Union.

“Every single ICE agent who’s engaged in this aggressive overreach and are trying to hide their identities from the American people will be unsuccessful in doing that. This is America. Not the Soviet Union. We’re not behind the Iron Curtain. This is not the 1930s. And every single one of them. No matter what it takes, no matter how long it takes, will of course be identified,” Jeffries said during a press conference.

This is a developing story.

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ICE agents met with mob resistance during LA immigration sweeps

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Quick Hit:

Immigration raids by ICE in downtown Los Angeles on Friday triggered heated confrontations with protesters attempting to block federal agents. Videos show chaotic scenes, including one protester throwing eggs and another injured during the standoff.

Key Details:

  • ICE agents, some in tactical gear, carried out immigration enforcement at several locations, including a business in the Garment District, sparking swift protests.

  • Demonstrators surrounded federal vehicles, shouted at agents, and attempted to obstruct arrests.

  • City leaders—including Mayor Karen Bass and Councilmember Eunisses Hernandez—condemned the operations, accusing ICE of stoking fear.

Diving Deeper:

Federal immigration agents with U.S. Immigration and Customs Enforcement (ICE) conducted enforcement actions across downtown Los Angeles on Friday, prompting swift and volatile protests from immigrant-rights groups and local activists. Tensions ran high as demonstrators tried to disrupt what ICE officials described as targeted raids aimed at individuals illegally residing in the country.

One high-profile confrontation unfolded outside a clothing store in the Garment District, where agents in riot gear reportedly detained several workers. Video from the scene showed large crowds forming outside, shouting at ICE officers and filming the arrests. As detainees were led to vans in handcuffs, one protester threw eggs at a vehicle. Another man, seen warning others in Spanish about the raid, joined others in a tense standoff as a federal van tried to maneuver through the crowd.

Footage captured one protester stepping backward in front of the moving van, eventually falling to the ground. The vehicle quickly drove off, surrounded by a swarm of shouting activists.

Homeland Security Investigations spokesperson Yasmeen Pitts O’Keefe confirmed that agents were serving warrants for individuals suspected of being illegally harbored in the U.S. However, Los Angeles officials expressed outrage over the tactics and timing of the operation.

Mayor Karen Bass issued a statement condemning the enforcement action, saying the raids “sow terror in our communities and disrupt basic principles of safety in our city.” She added, “We will not stand for this.”

Despite the backlash, ICE made no apologies. Agents completed their arrests and moved on, leaving behind city leaders scrambling to do damage control—and activists fuming that federal law was actually being enforced in Los Angeles.

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