Before 1990, there had never been a documented case of a patient getting HIV from a health care worker. Kimberly Bergalis changed that. Her claim that she’d been infected by her dentist would captivate and terrify the country. And the dentist, David Acer, would be made into a villain without...

Robert Mapplethorpe was one of the most famous photographers in the world—and one of the most controversial. When his work came to Cincinnati in 1990, it would be at the center of a vicious fight over obscenity and the First Amendment, one that threatened the future of art in America. This...