The Chernobyl disaster on 25–26 April 1986 rocked the world as one of only two nuclear energy accidents classified as a level 7 event (the maximum classification) on the International Nuclear Event Scale (the other being the Fukushima Daiichi nuclear disaster). It took 31 lives related directly to the incident, and despite the incident occuring decades ago, the impact on survivors' health is still not completely clear. The accident required tremendous effort to decontaminate, with one of the bigger projects being a large cover over reactor 4 known as "The Sarcophagus" that was finished in December 1986. It was built as an effort to reduce the spread of the remaining radioactive dust as the remaining reactors 1, 2 and 3 still remained functional and had crews working (reactor 3 produces electricity up into 2000 before its shutdown). Despite the power plant no longer working, the clean-up efforts are still undergoing and are scheduled to be completed in 2065. The structure in the photo is of the New Safe Confinement built over the original sarcophagus and is intended to prevent the release of radioactive contaminants from the existing shelter, protect the reactor from external influence, facilitate the disassembly and decommissioning of the reactor, and prevent water intrusion.