How The 8th Wonder Of The World Failed Due To An Engineering Oversight |Massive Engineering Mistakes

The Kinzua bridge in Pennsylvania, USA, was once considered the tallest rail bridge in the world. However, a small but catastrophic mistake made the famous bridge fall from grace. Subscribe to Discovery UK for more great clips: http://www.youtube.com/subscription_center?add_user=DiscoveryTV Follow Discovery UK on Twitter: http://www.twitter.com/DiscoveryUK