Also on Sept 11 (which was celebrated in my house as the birthday of Tom Landry)....
1609 - Henry Hudson discovers Manhattan Island
1923 - The ZR-1 (biggest active dirigible) flies over NY's tallest skyscraper, the Woolworth Tower
1941 - Charles Lindbergh, charges "the British, the Jewish & the Roosevelt administration" are trying to get the US into WW II as FDR orders any Axis ship found in American waters be shot on sight
And finally one to keep a Las Vegas theme going...
1936 FDR dedicates Boulder Dam, now known as Hoover Dam