#4 Most Expensive Accident of Human History The Space Shuttle Challenger was destroyed 73 seconds after takeoff due on January 28, 1986 due to a faulty O-ring. It failed to seal one of the joints, allowing pressurized gas to reach the outside. This in turn caused the external tank to dump its payload of liquid [...]

#5 Most Expensive Accidents of History The world’s worst off-shore oil disaster. At one time, it was the world’s single largest oil producer, spewing out 3,17,000 barrels of oil per day. On July 6, 1988, as part of routine maintenance, technicians removed and checked safety valves which were essential in preventing dangerous build-up of liquid [...]

#6 Most Expensive Accidents in History The Exxon Valdez oil spill was not a large one in relation to the world’ s biggest oil spills, but it was a costly one due to the remote location of Prince William Sound (accessible only by helicopter and boat). On March 24, 1989, 10.8 million gallons of oil [...]

#7 Most Expensive Accidents in History Here we have our first billion dollar accident (and we’re only #7 on the list). This B-2 stealth bomber crashed shortly after taking off from an air base in Guam on February 23, 2008. Investigators blamed distorted data in the flight control computers caused by moisture in the system. [...]