On this day in history, September 18, 1870, Old Faithful geyser in Wyoming is documented and named

1859 – Joshua A. Norton declares himself "Norton I, Emperor of the United States."

On this day in history, September 17, 1937, Abraham Lincoln carving is officially dedicated at Mount Rushmore

1987 – The Montreal Protocol is signed to protect the ozone layer from depletion.

On this day in history, September 16, 1919, Congress grants national charter to the American Legion

1835 – HMS Beagle, with Charles Darwin aboard, reaches the Galápagos Islands. The ship lands at Chatham or San Cristobal, the easternmost of the archipelago.

On this day in history, September 15, 1950, US troops land at Inchon, turning the tide of the Korean War

On this day in history, September 14, 1814, American 'flag was still there' after attack on Fort McHenry

2015 – The first observation of gravitational waves is made, announced by the LIGO and Virgo collaborations on 11 February 2016.

2000 – Microsoft releases Windows Me.

1956 – The IBM 305 RAMAC is introduced, the first commercial computer to use disk storage.

On this day in history, September 13, 1857, milk chocolate magnate Milton Hershey is born

2013 – NASA confirms that its Voyager 1 probe has become the first manmade object to enter interstellar space.

1977 – South African anti-apartheid activist Steve Biko dies in police custody.

1958 – Jack Kilby demonstrates the first working integrated circuit while working at Texas Instruments.

1933 – Leó Szilárd, waiting for a red light on Southampton Row in Bloomsbury, conceives the idea of the nuclear chain reaction.

On this day in history, September 12, 1953, John F. Kennedy weds Jacqueline Bouvier in Newport, Rhode Island

I hadn't heard of this documentary.  This French film crew happened to be following the members of the FDNY that day.  Their planned shoot changed dramatically, as that day did for all of us.

It's like celebrating the defeat at the Alamo.

In December 1998, the Director of Central Intelligence Counterterrorist Center reported to President Bill Clinton that al-Qaeda was preparing for attacks in the U.S., including training personnel to hijack aircraft.

Two of the hijackers were Saudis, not Iraqi, and the Bush administration and FBI blocked a congressional investigation into that relationship", as reported by the Miami Herald: "And in Graham's book, Intelligence Matters, obtained by The HeraldSaturday, he made clear that some details of that financial support from Saudi Arabia were in the 27 pages of the congressional inquiry's final report that the administration blocked from release, despite pleas from leaders of both parties on the House and Senate intelligence committees."

The Wikipedia page has an in depth review of why it happened. It should be remembered, and the dead mourned, but I disagree that it's something on which to hang our typical 'Merica jingoism.