The collapse of the Tacoma Narrows suspension bridge is one of the world's most recognised structural failures.
Were there any warnings from history that this failure could have occurred, and more importantly, if failures like this had ever happened at the past - why did we as a profession forget the lessons learned?
Footage of the bridge collapse can be viewed on YouTube https://youtu.be/j-zczJXSxnw
The tragic crash of the Virgin Galactic spacecraft carries lessons for all of us. Do failures happen because humans make mistakes? Or do they happen because we design systems that ultimately fail us as humans?
Detailed article on the disaster can be found at https://docs.wixstatic.com/ugd/52fa7d_155a03ee1ac745c7a6edd76118a71e16.pdf
The National Transportation Safety Board's report can be found at http://www.ntsb.gov/investigations/AccidentReports/Reports/AAR1502.pdf
The National Transportation Safety Board video of the seconds leading up to the disaster can be found at http://www.ntsb.gov/news/events/Pages/2015_spaceship2_BMG.aspx