08 June 1958,
David Isom disobeyed the racist rules of the Florida pool. At the time of racial segregation, in the pool area whites and blacks were separated by a line, while whites were remarkably better. Isomek, 19, crossed the color line and swam in the white area. He then indicated that swimming in an orderly pool should not be a privilege, but a right, which found a peaceful atmosphere. Those responsible closed the pool because “a black man used the facilities” and remained closed for four years.
Source:
Meet David Isom, the 19-Year-Old Who Broke The Color Line At A Segregated Pool In 1958 (Because of them we can).