8 Most Expensive Engineering Mistakes the World Has Seen

When you're building a house, a bridge, or some other impressive construction, some serious planning must be done, and every detail matters. The construction of the Tacoma Narrows Bridge in Washington was finished 1940, a twin suspension bridge was unique and one-of-the-kind construction never seen before. In today’s equivalent, it cost about 1 billion bucks. Still, despite the amount of money spent, the bridge lasted slightly over 4 months. The engineers apparently missed one highly important issue - the wind.