Trump posts photos of Lincoln Memorial Reflecting Pool after algae cleanup, urges arrest of vandalism suspect

President Donald Trump shared images on Truth Social showing the Lincoln Memorial Reflecting Pool clearer than it appeared earlier in its reopening cycle, crediting “advanced nanobubbler technology,” and called for the arrest of people he alleged were responsible for vandalism.

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President Donald Trump on Sunday posted on Truth Social photos he said show the Lincoln Memorial Reflecting Pool “crystal clear,” with the Washington Monument reflected in the water, and urged that a person described as involved in vandalism be arrested.

In the same post, Trump directed attention to a U.S. Park Police public notice and said the department was seeking the public’s help identifying an individual connected to a “Destruction of Government Property” investigation tied to the Reflecting Pool.

Trump’s post also echoed an Interior Department account that the pool’s algae was killed using “advanced nanobubbler technology” and that cleanup work by the National Park Service contributed to restoring the pool’s appearance after earlier deterioration and algae problems.

The Trump administration’s comments and the broader reporting around the Reflecting Pool have described multiple incidents of alleged tampering and faster-than-expected deterioration after repairs. Earlier coverage cited Interior Secretary Doug Burgum saying vandals left major damage, and reporting also said law enforcement had made multiple arrests connected to the case.

Separate reporting in late June and early July described claims by Trump that vandals slashed the pool’s lining and poured chemicals into the water. That reporting also described Trump linking the administration’s next steps on restoration and enforcement to those allegations and the progress of arrests.

One case discussed by multiple outlets involves David “Davey” Hearn, a three-time Olympian canoeist, who was reported as indicted by a D.C. grand jury for alleged destruction of property after an arrest connected to the Reflecting Pool. ABC News reported Hearn told the outlet he did not damage anything when he was detained after touching a piece of blue coating that officials said was part of the resurfacing work.

The administration’s public message around the Reflecting Pool has therefore focused on two parallel tracks, restoration and enforcement. The restoration claim centers on an algae-killing process using nanobubbles, while the enforcement track centers on ongoing identification, arrests already made in connection with alleged vandalism, and formal charges where prosecutors have brought them.

Why It Matters

The administration’s effort combines visible infrastructure restoration at a high-profile national landmark with criminal enforcement, underscoring potential public safety and property-protection stakes at the National Mall.
Public identification notices and criminal charges report that alleged vandalism may be pursued through the federal system, where due process and evidentiary standards apply in court.
Because the Reflecting Pool’s condition directly affects tourism and public access to the National Mall, repeated cycles of cleanup and repair can increase costs and logistical burdens for federal agencies.
The case also highlights how officials use scientific or technical claims, such as nanobubbler technology, to explain changes in environmental conditions that are central to public-facing facilities.

Sources

Key Facts

President Donald Trump posted photos on Truth Social Sunday showing the Lincoln Memorial Reflecting Pool appearing clear and blue, with the Washington Monument reflected.
Trump said the pool’s algae was killed using “advanced nanobubbler technology,” crediting National Park Service cleanup work as well.
Trump referenced a U.S. Park Police public notice seeking the public’s assistance identifying an individual connected to a Destruction of Government Property investigation tied to the Reflecting Pool.
Multiple outlets reported that Interior Secretary Doug Burgum described major vandalism damage to the Reflecting Pool and that arrests occurred in connection with alleged tampering.
David “Davey” Hearn was reported as indicted by a D.C. grand jury for an alleged Reflecting Pool destruction of property offense following an earlier arrest, and he told at least one outlet he did not damage anything.