Robert E. Fassnacht (January 14, 1937 – August 24, 1970) was an American physics post-doctoral researcher who was killed by the August 1970 bombing of Sterling Hall on the University of Wisconsin–Madison campus, perpetrated as a protest against the Vietnam War. Fassnacht was a student from South Bend, Indiana, who received a Westinghouse scholarship to attend college. He was at the University of Wisconsin–Madison pursuing post-doctoral research in the field of superconductivity. Bombing On the night of August 23 and into the early morning hours of August 24, 1970, Fassnacht was in the lab taking care of unfinished work because he and his family were slated to leave for a vacation in San Diego, California. His lab was located in the basement of Sterling Hall. He was in the process of cooling down his dewar with liquid nitrogen when the explosion occurred. Rescuers found him face down in about a foot of water. The cause of death, determined from the autopsy, was internal trauma. As a protest against the Vietnam War, the bomb was built and planted by Karleton "Karl" Armstrong, Dwight Armstrong, David Fine, and Leo Burt. The intention was to destroy the Army Mathematics Research Center, but instead destroyed much of the physics department and severely damaged neighboring buildings. After the bombing Family Fassnacht was survived by his wife, Stephanie, and their three children, a three-year-old son, Christopher, and twin daughters, Heidi and Karin who turned one a month after their father's death. The family continued to live in Madison in relative quiet and anonymity for many decades after the explosion, often crossing paths with the site of their father/husband's murder. Stephanie Fassnacht completed a long career at the University of Wisconsin–Madison, occupying an office just blocks from the site of her husband's death. She stated that she harbored "no ill will" toward Karl Armstrong "and never did." Instead she held the Board of Regents responsible. Christopher attended Harvard University and Caltech and is now a physics professor at the University of California at Davis. Heidi and Karin both graduated from the University of Wisconsin–Madison. Commemorative plaque On May 18, 2007, the University of Wisconsin–Madison unveiled a plaque on the side of Sterling Hall commemorating the bombing and Robert Fassnacht's death. The event was attended by John D. Wiley, then Chancellor of the University of Wisconsin–Madison and an acquaintance of Robert Fassnacht, by current and former members of