List of September 11th memories and recollections of Patriot Day. Where was the population of America when two planes crashed into the World Trade Center towers and a third plane crashed into the Pentagon on 9/11? It is a "day that will live in infamy." It was an event that brought the nation and international community together in solidarity and propelled the United States into an era of foreign wars and economic hardship. Most Americans remember where they were when they first heard about the 9/11 attacks. Some were witnesses to 9/11, while others were just waking up on the West Coast, driving to work or sitting in class.Do you remember where you were on 9/11? Vote for the location where you first heard about September 11th, were watching the coverage on TV or listening to it on the radio. Add the location where you were if it is not listed.