President Trump's efforts to spruce up the Lincoln Memorial Reflecting Pool faced a snag this week, with algae turning the water green while rips appeared in an "American Flag Blue" surface picked by the president.

Green algae reappeared in the Lincoln Memorial Reflecting Pool days after Trump's $13 million renovation, prompting questions about the project's effectiveness.

Algal blooms have hit the site, between the Lincoln Memorial and the Washington Monument, after an expensive repair project