Las Vegas By yenbao May 15, 1905 Las Vegas is Founded Jun 1, 1911 Las Vegas is Incorporated 1931 Hoover Dam Construction Begins 1931 Gambling is Legalized in Nevada 1936 Hoover Dam is Completed 1941 First Casino on the Strip Opens 1946 Bugsy Siegel Builds the Flamingo 1947 Bugsy Siegel is Murdered 1951 First Atomic Bomb Tests in Las Vegas 1966 Howard Hughes Buys the Desert Inn 1989 Steve Wynn Opens the Mirage 1995 The Fremont Street Experience Opens