National Park Service employees work to clean up algae in the Lincoln Memorial Reflecting Pool following the completion of recent renovations on June 14, 2026 in Washington, DC. The Lincoln Memorial Reflecting Pool was intended to reopen as a patriotic showpiece of Donald Trump's Washington, D.C., beautification plan, with the bottom of the pool freshly coated in what he called "American flag blue" and the feature ready for the country's 250th anniversary.