Jimmy Hoffa Disappears | July 30

1975: Jimmy Hoffa disappeared after a meeting with Detroit crime figure Tony Jack Giacalone and New Jersey Teamster boss Tony Pro, sparking a mystery that persists to this day. Despite numerous speculations, Hoffa's final resting place remains unknown. 1997: The Michigan Supreme Court legalized charter schools, a controversial educational model praised by some and criticized by others for its impact on public education.