Which of the Following Did NOT Happen

Which of the following did NOT happen?

A) In 1997, President Clinton apologized on behalf of the federal government to living survivors of the Tuskegee Study.
B) In 1994, it was revealed that physicians and scientists working for agencies of the federal government had exposed many Americans to in non-therapeutic radiation experiments without the consent of the American subjects.
C) In the 1940's at the University of Rochester Hospital, physicians injected plutonium into some healthy patients, without their knowledge, to study what kind of physical damage would happen to people during a nuclear war.
D) In 1991, during Operation Desert Storm, military personnel were forced to take anti-biological-warfare and experimental vaccines.
E) Over the 40 years of the Tuskegee Study, many physicians publicly complained about it by writing letters to medical journals and tried to have it stopped.