With all the hullabaloo about North Korea building nuclear weapons, maybe the biggest threat from the increasing number of nukes is the risk of an accident with the potential to contaminate a large area. The accidental detonation of a nuke in the wrong place at the wrong time could trigger a conventional war that could destabilize a large region of the world.
The U.S. has had its share of accidents and one of the worst was in the early 1970s. The Baneberry Incident was supposed to be a routine underground test of an nuclear device located about 975 feet below the Nevada Test Site.
However the blast severely ruptured the geologic strata, creating the moral equivalent of a "volcano" that vented radioactive dust and debris for nearly 48 hours. Radiation monitoring indicated the contamination spread across the U.S. and into western Europe.
https://en.m.wikipedia.org/wiki/Operation_Emery
The U.S. has had its share of accidents and one of the worst was in the early 1970s. The Baneberry Incident was supposed to be a routine underground test of an nuclear device located about 975 feet below the Nevada Test Site.
However the blast severely ruptured the geologic strata, creating the moral equivalent of a "volcano" that vented radioactive dust and debris for nearly 48 hours. Radiation monitoring indicated the contamination spread across the U.S. and into western Europe.
https://en.m.wikipedia.org/wiki/Operation_Emery