It's now fourteen years since the Twin Towers fell. But time has not fully taken away the sense of loss. Marking the day on which almost 3000 people died, America again came together to remember the worst terrorist attack in recent history.
In Washington, at the White House, President Obama marked the day with a moment of silence, just a few miles from where one of the four planes was flown into the Pentagon.
The first plane hit one of the towers of the World Trade Center in New York.
As in years past, relatives and survivors gathered here, standing beside the pools of remembrance, where water cascades into the vast foundations of where the Towers once stood.
And they read the names of every person who died - a task taking almost four hours to complete.</
