It's been seven years, and that one day has changed our world. Rumors of friends dead in the towers, others missing - later to find out they were just late to work. It has changed a lot of things. From big to small. American politics, the world map, and casual trips to the airport, and cameras in cell phones.
What still is so striking is that every single movie from 1969 to 2001 still strikes a chord in my heart. I also would suggest Paul Greengrass's Flight 93 if you want to 'get into' that emotion that happened on that day.