People born after the 1970s may not be aware of the Teton Dam collapse, but it was another case of total disregard for many, many expert warnings of disaster in the rush to build something big and impressive. Here's kind of a cheesy documentary clip describing the incident , but the book Cadillac Desert  goes into some detail if you're curious.
FWIW, there is a four-hour PBS style documentary based on the book. This book is the most prescient thing about the biggest issue ( multiply prescience by the size of the issue and it sorts to the top ) I probably will ever read.
Off topic, but I recently discovered the "anti-cheese" edits to the prequels, and they are a huge improvement to the originals, in my opinion. Among other changes, it removes almost all of the Jar Jar Binks scenes, and replaces all of the racially stereotyped alien accents with alien "languages" and subtitles. Of course, the edits make the movie a bit disjointed, but it was much easier to stomach than the originals. You can find them on youtube if you search "anti-cheese".
I watched the films in Machete Order with my girlfriend in advance of the premiere of The Force Awakens last week. She hadn't seen any Star Wars movie in 15 years, and the Machete Order worked out quite well. I'd considered watching one of the two hour long "Phantom Edits," but it seemed too difficult to find one of good quality.