And the experiments were/are worldwide.
In 1951, many the habitants of a little town called "Pont Saint Esprit" get sick, with psychotic episodes.
It has long been supposed, even if some facts weren't totally consistent with this explanation, that it was an outbreak of ergotism.
According to Hank P. Albarelli Jr in the book "a terrible mistake" in 2009, this was in fact a secret operation of CIA under the MKULTRA program. Some official declassified documents seem to accredit this version.