On a clear autumn morning, I stood where the Twin Towers used to be and anxiously waited for a friend to arrive. Since my last visit in 2005, the site has been converted into the 9/11 Memorial. The monument is extremely simple, yet it carries a powerful message: two man-made waterfalls flow into the ground at the footprints of the original Twin Towers. As I stood there, vivid memories of that day came back to me. It has been almost 15 years, and I wasn’t even in New York City, yet I still remember everything I did from the moment I woke up to the moment I went to bed.