Responses from professors, students, and many others to the November 1, 1991 shooting at the University of Iowa in which a former physics graduate student, Gang Lu, killed Christoph K. Goertz, a professor of physics; Dwight R. Nicholson, a professor of physics and chair of the department; Robert Alan Smith, an associate professor of physics; Linhua Shan, a postdoctoral research investigator in the department; and the university's associate vice president for academic affairs, T. Anne Cleary; and wounded a student then killed himself.