The moments in time where something so horrific happens we all remember exactly where we were and what we were doing during the moment.
On June 28, 1914, Archduke Franz Ferdinand of Austria, heir presumptive to the Austro-Hungarian throne, and his wife, Sophie, Duchess of Hohenberg, were shot dead in Sarajevo, by Gavrilo Princip. This single horrific act catipulted the world into a World War I. The war to end all wars. No one could have guessed that within 23 years World War II would begin when Hitler revealed his war plans during the Hossbach Conference.
Again November 22, 1963, around 12:30 in Dallas, Texas, when President John F. Kennedy was assassinated, again such a horrific act that people remembered for the rest of their lives what they were doing and where they were at when they heard that Kennedy was shot. Covered in a shroud of conspiracy since the day it happened the direction of the country, and the power base of the leading country of the free world was forever taken on a darker and different course.
More recently, September 11, 2001, four passenger jets were hi-jacked. Two of the planes were intentionally piloted into the North and South Towers of the Twin Towers, and both towers collapsed within two hours.
A third plane was piloted into the Pentagon. The fourth was supposed to be flown into the Capital Building, but was brought down by the passengers and crew to crash in a field in Pennsylvania. This was another situation were everybody will remember where and what they were doing when they heard about the attack. The aftermath of the attack was the War on Terror, again changing the course of history.
These monumental pivotal moments that radically change the course of future events in so many countless ways. The important part is that we never forget. That we learn from our mistakes, our victories, and not let those whose lost their lives needlessly, as heroes trying to help and save others, that we never forget so they will never be forgotten.