that would be possibile
If gangster Bugsy Siegel never got suport by Mafia boss Meyer Lansky, to build the casio "The Flamingo" in Las Vegas
or The Senate Special Committee to "Investigate Crime in Interstate Commerce" in 1950–51.
get to the conclusion to institute federal gambling prohibition.
In that case Las Vegas would be today a empty radioaktive ghost town near AEC Nuclear Testsite