America remembers the day that changed the world forever
It took five hours to read the names of the 2,753, victims who died in New York when the Twin Towers were attacked 10 years ago.
America showed its solidarity with heartbroken family members by holding silences at 8.46am and 9.03am, marking the moment the two planes struck.
Among those remembering their loss was Robert Peraza.
His son Rob, a trader with investment bank Cantor Fitzgerald, was killed aged 30.
Touching the spot where his name is engraved at the Ground Zero memorial, head bowed, he said: "Rob, we love you, we are with you all the time and we'll never forget, we'll never forget, we'll never forget."