It will be a landmark memorial to Americans, and why not to say, the world, to celebrate the coming September 11th.
10 years ago people watched in astonishment in front of the TV, or online, the Twin Towers of the World Trade Center collapsing after being hit by two airplanes.
Two other airplanes were also hijacked, with one hitting the Pentagon and the other one falling in Pennsylvania, where it crashed on a field.
Hijackers and passengers were all killed.
At that time nobody knew yet that the terrorist attack was planned by al-Qaeda, as Osama Bin Laden would admit four years later, in 2004.
What everybody knew was that nothing would be the same again.
The world had come to know that America was as vulnerable as any other country despite its well-prepared Army and all its investment in security.
The Attacks have changed the foreign police of many countries in the battle against terrorism. Germany, England and Canada, for example, passed anti-terrorism laws.
On the morning of September 11th , 2001 around 3,000 people were killed. Among the victims, firefighters and police officers who where there to rescue them.
Among those victims was photographer Bill Biggart who spent the last hours of his life taking close pictures of the burning towers and the area around them.
By Melissa Queiroz