Photo illustration by Alex Bandoni. Source images: Bettmann/Getty Images and Nguyen Huy Kham/Reuters.
by Anna Maria Barry-Jester and Brett Murphy
ProPublica, and Le Van for ProPublica March 17, 2025, 6 a.m. EDT
In mid-February, Trump administration leaders received a desperate warning from their diplomats posted in Vietnam, one of the most important American partners in Asia.
Workers were in the middle of cleaning up the site of an enormous chemical spill, the Bien Hoa air base, when Secretary of State Marco Rubio abruptly halted all foreign aid funding. The shutdown left exposed open pits of soil contaminated with dioxin, the deadly byproduct of Agent Orange, which the American military sprayed across large swaths of the country during the Vietnam War. After Rubio’s orders to stop work, the cleanup crews were forced to abandon the site, and, for weeks, all that was covering the contaminated dirt were tarps, which at one point blew off in the wind.
And even more pressing, the officials warned in a Feb. 14 letter obtained by ProPublica, Vietnam is on the verge of its rainy season, when torrential downpours are common. With enough rain, they said, soil contaminated with dioxin could flood into nearby communities, poisoning their food supplies.
Hundreds of thousands of people live around the Bien Hoa air base, and some of their homes abut the site’s perimeter fence, just yards from the contaminated areas. And less than 1,500 feet away is a major river that flows into Ho Chi Minh City, population 9 million.
“Simply put,” the officials added, “we are quickly heading toward an environmental and life-threatening catastrophe.”
They received no response from Washington, according to three people familiar with the situation.
Instead, Rubio and Peter Marocco, another top Trump appointee, have not only ordered the work to stop, but they also have frozen more than $1 million in payments for work already completed by the contractors the U.S. hired. The company overseeing the project is Tetra Tech, a publicly traded consulting and engineering firm based in the U.S., and a Vietnamese construction firm has been tasked with the excavation work.
Then, on Feb. 26, Rubio and Marocco canceled both companies’ contracts altogether before apparently reversing that decision about a week later, agency records show. As of Thursday, the companies had not been paid.
The Trump administration has told the courts repeatedly that its process to dismantle the U.S. Agency for International Development, which manages the project’s funds, has been careful and considered. But the botched situation at Bien Hoa is a stark example of the whiplash, conflicting messages and dire consequences that aid organizations worldwide have faced since early February.
Now, after losing several weeks because of the administration’s orders, the companies are scrambling — at their own expense — to secure the Bien Hoa site before it starts raining, according to documents reviewed by ProPublica and several people familiar with the current situation.
The USAID officials who would typically travel to the air base to provide oversight have been placed on administrative leave or prevented from traveling to check on the work. They’ve also been forbidden from communicating with the Vietnamese government or the companies working at the base, sources say, though they believe that directive was lifted after the contracts were recently reinstated. The confusion has left many at both the embassy and in Washington in the dark about where the situation stands.
To ascertain the current status of the work, ProPublica hired a reporter to visit the air base on Friday.
Workers are laboring in 95 degree heat, surrounded by toxic soil. The site has a skeleton crew of less than half of what they previously had, according to workers and documents reviewed by ProPublica. Some staffers found new jobs during the suspension. People working at the site told the reporter they are worried about completing the work before the rainy season descends and are terrified the U.S. will pause the work again.
Since 2019, the U.S. government has collaborated with Vietnam’s Ministry of Defense to clean up the Bien Hoa air base and agreed to spend more than $430 million for the project. Unlike other foreign aid programs, addressing Agent Orange is more akin to restitution than charity because the U.S. brought the deadly substance there in the first place. “The dioxin remediation program is one of the core reasons why we have an extraordinary relationship with Vietnam today,” a State Department official told ProPublica, “a country that should by all rights hate us.”
With enough contaminated soil to fill about 40,000 dump trucks, the Bien Hoa air base is the largest deposit of postwar pesticides remaining in Vietnam after a decadeslong cleanup campaign. Human rights groups, environmentalists and diplomats consider the cleanup work — along with disability assistance that the U.S. has provided to Agent Orange victims across the country — to be one of the most successful foreign aid initiatives of all time.
All of that was now in peril, the officials wrote in their Feb. 14 letter to USAID officials in Washington. “What immediate actions can be taken to avert a potential life-threatening incident while still maintaining compliance with the Executive Order and the suspension directives?” the officials wrote.
U.S. officials in Vietnam grew increasingly panicked. The ambassador sent a diplomatic cable to Washington, and Congress and USAID’s inspector general each received a whistleblower complaint, multiple people told ProPublica.
“Halting a project like that in the middle of the work, that’s an environmental crime,” said Jan Haemers, CEO of another organization that previously worked in Vietnam to clean up Agent Orange in the soil. “If you stop in the middle, it’s worse than if you never started.”