Two men with ties to Detroit share this date in history. One was born on July 30 (Henry Ford), the other likely died on that date (Jimmy Hoffa).
We say likely because Hoffa's disappearance 40 years ago is still a mystery.
For those who don't know, Hoffa vanished while waiting for two men outside a restaurant in Bloomfield Township, MI, an affluent suburb of Detroit.
Rumors persist that he was killed by the Mafia to keep him from muscling his way back into the Teamsters Union.
Hoffa had served as union president until a bribery conviction landed him in prison. He caught a break in 1971 when Richard Nixon commuted his sentence.
But a stipulation of his release was that Hoffa was forbidden from involvement in union activities until 1980. Hoffa tried anyway, because he wasn't accustomed to being told no.
If you've ever seen the film, It's a Mad, Mad, Mad, Mad World, there's a scene involving Jonathan Winters' character trashing a gas station.
The two attendants do their best to keep him at bay until finally one of them says, "That's it Irwin, we're gonna have to kill him!"
That may have been the thinking in Hoffa's case.
While his death has never been confirmed, it was declared in absentia in 1982, on the seventh anniversary of his disappearance.
Perhaps, his fate was sealed at birth. Hoffa's middle name was Riddle.