The Edgewood experiments took place from approximately 1952-1974 at the Bio Medical Laboratory, which is now known as the U. S. Army Medical Research Institute of Chemical Defense. The volunteer would spend the weekend on-site. They would perform tests and procedures (math, navigation, following orders, memory and interview) while sober. The volunteer would then be dosed by a scientist and perform the same tests. These tests occurred in the building/hospital under the care of doctors and nurses. At times the tests would be taken outside to study the effects while in the field. For example the volunteer would have to guard a check point while under the influence to see what effects certain drugs had on the patient.