Salmonella in Oregon
Some years ago, an epidemic in Wasco County.
 Some health officials suspected the followers of guru Bhagwan Shree Rajneesh living nearby.
They were unable to find convincing evidence that the epidemic wasnÕt natural.
Later, some cult members confessed, the community was searched; the group had been developing a germ warfare program.
Even a large effect might be seen as natural when it isnÕt.