There seems to have been an allegation that the government, beginning in the mid 1970s and lasting till the early 1980s, may have conducted clandestine operations in and near Dulce, New Mexico involving experiments with bovine diseases, anthrax and other substances as part of biological warfare research. See the following clip on cattle mutilations that took place in the Dulce area in the late 1970s (History Channel, March 25, 2009)