We all remember what we were doing on September 11, 2001. Initially, it was a tragedy, an airliner had crashed into one of the buildings of the Twin Towers. As the day went on, the events that followed quickly turned a terrible tragedy into the worst nightmare in American history. 9/11 was not only terrible and tragic, it is considered to have divided history. Nowadays, we speak of the “pre-9/11″ and “post-9/11″ world. Today, we remember the victims, and the Americans who have lost their lives fighting for this country. These are 5 videos that give a glimpse into the feelings that were felt on-air that terrifying, confusing day, the one that is still shaping our modern world.