From Wikipedia

Rosenthal survived an October 1982 assassination attempt in Las Vegas, in which a car bomb (attached to the gasoline tank) was detonated when he started his car.He survived only because of a manufacturing irregularity that was unique to his particular vehicle (a 1981 Cadillac Eldorado): a metal plate under the driver's seat (which General Motors installed to correct a balancing problem), which shielded Rosenthal's body from most of the explosion's force. Although no one was ever charged for this assassination attempt, Milwaukee mob boss Frank Balistrieri was most likely responsible. Balistrieri, who was known as the "Mad Bomber" to law enforcement, was heard (via wiretap) blaming Rosenthal for the legal problems the mob-controlled casinos were suffering. Similarly, just weeks before the bombing, Balistrieri told his sons he intended to get "full satisfaction" for Rosenthal's perceived wrongdoing.Other suspects included Spilotro (either acting alone, or on behalf of the Chicago Outfit), and outlaw bikers who were friends of Rosenthal's ex-wife, Geri.

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