What were they?!
https://www.washingtonpost.com/news/early-lead/wp/2016/07/26/theres-still-lots-and-lots-of-poop-in-the-water-at-the-rio-olympics/-
More: http://www.dailymail.co.uk/news/article-3717326/Rio-Olympics-2016-Sailing-ramp-collapses-one-week-racing-starts.html