President Donald Trump said vandals damaged the Lincoln Memorial Reflecting Pool on the National Mall in Washington, D.C., between June 21 and 22 [1].

The incident is significant because it involves the alleged destruction of a high-profile national landmark and the potential for costly, repeated maintenance of a public site.

Trump said that the vandals created a large gash in the pool's newly repainted facade and caused the water to turn green due to algae [1]. He said the pool would need to be drained again to facilitate repairs [1].

Regarding the specific damage, Trump said, "Multiple people were arrested for vandalism, including slicing a 250-foot gash in the pool’s newly repainted facade" [1]. Other reports cited a gash length of 350 feet [2].

Trump said, "They went in there with a knife" [3]. He said that "vandals slashed the reflecting pool" [2].

Reports indicate that five people were arrested in connection with the alleged vandalism [4]. The White House has not provided further evidence to support the claims of a structural gash beyond the statements made by the president [2].

"They went in there with a knife."

The claims highlight a recurring tension between presidential assertions of public disorder and the verified evidence provided by federal agencies. Because the Reflecting Pool is a centerpiece of the National Mall, any confirmed structural damage would require significant federal funding and coordination between the National Park Service and the Department of the Interior.