On this day, July 30, 1975, legendary Teamsters President Jimmy Hoffa had an afternoon meeting planned at the  Macchus Red Fox restaurant in suburban Detroit, one of those dimly lit  places with deep, plush booths. It's believed the others planning to  attend were a pair of local organized crime leaders.  Hoffa pulled into the parking lot that day and disappeared. Every year, it seems, new "evidence" is found but he has not been seen since.

 Today, the International Brotherhood of Teamsters is led by a familiar  name, Jimmy's son James P. Hoffa, who was elected in 1999. Unions have a considerable amount of political influence.