 Complete the following phrase:  Multiple United States presidents, including Jimmy Carter in 1979, Ronald Reagan in 1984, George H. W. Bush in 1991, Bill Clinton in 1993, and Barack Obama in 2011, have promised that the Holocaust would not happen again, and that action would be forthcoming to stop genocide. However, genocide occurred during their presidencies: Cambodia in Carters case, Anfal genocide during Reagans presidency, 