The morning of September 11, 2001—when two hijacked planes crashed into the World Trade Center, and two others, also hijacked, crashed into the Pentagon and a field in Pennsylvania—is one of those moments for which everyone who was conscious that day will always remember where they were. The memorial at the World Trade Center sites, however, assures that the events will not be forgotten even by those too young to have been aware of what was happening as well as future generations. Two square holes in the ground trace the footprints of the original towers, with waterfalls cascading into two pools below street level. The names of the nearly 3,000 people who died on that day, as well as the six who died in a 1993 truck bombing also at the World Trade Center, are inscribed on bronze panels along the edges of the twin memorials. The museum at the site brings to life the stories of those who were killed on 9/11—workers at the World Trade Center, rescuers, and others—through artifacts and interactive exhibits. There are also artworks that respond to and reflect on the events.