In 1896, Dr. Walter B. Cannon said, “The antivivisectionists are the second of the two types Theodore Roosevelt described when he said, ‘Common sense without conscience may lead to crime, but conscience without common sense may lead to folly, which is the handmaiden (servant) of crime.’ ” The public first began giving its attention to the supporters and opposers of animal testing during the brown dog affair in the early 1990s. In the brown dog affair, hundreds of medical students and anti-vivisectionists and police argued over a memorial to a vivisected dog.