Many Americans have no idea this exist.
This 100 ft tall monument was gifted to the people of the United States by the people of Russia in 2006, in memory of all those who lost their lives on that fateful day, September 11, 2001.
The breaking in the cracked façade forms the shape of the two towers.
The giant suspended tear drop signifies the tears of the entire world that day.
One of the workers who cleans the 9/11 Memorial pool shares his story.
He cleans the pool with another worker five nights a week, from midnight to 8 AM.