Three Mile Island: A Nuclear Crisis in Historical Perspective historian to the NRC which has placed him in an unrivalled position to tell the TMI story. But Harris identifies some omissions in the book. There is little on the other two major nuclear that threatened large civilian populations: the Windscale fire (UK, October 1957), and the Chernobyl disaster (Ukraine, April 1986). Harris states that Windscale threw up similar problems to TMI, particularly relating to whether large-scale evacuations should have been initiated, but he could find no reference to the Windscale accident in the book's index which is surprising in a book that aims to put TMI in historical perspective.
Ryanggang explosion popular speculation that the explosion was nuclear in origin. United States Secretary of State Colin Powell said there was "no indication" that it was nuclear, and South Korea similarly said that it did not appear to be nuclear. It would be some days before the effects of a nuclear explosion would be unequivocally visible to apolitical authorities. It would not be possible to hide the nuclear nature of such an explosion for long, as the radioactive isotopes created by a nuclear explosion would be detectable to outside observers around the world. North Korea initially denied that the explosion was nuclear.