People across the US, including top statesmen, are to join Tuesday's commemorations of the September 11 victims on the sixth anniversary of the horrific terrorist attacks that took the lives of about 3000 people.
The events begin at 08:46, the exact time when the first hijacked plane struck the north tower of the World Trade Centre in New York six years ago. At the very same time, toll of bells is to reverberate throughout the first hit state.
There will be three more minutes of silence later during the day to mark the times when the second plane struck and each tower collapsed.
Firefighters, construction workers and ordinary citizens, who first joined the rescue operations after the terror attacks, will read the names of all 2,749 victims during the traditional commemoration ceremony.
US President George Bush is to stand in silence for a minute in memory of the victims on the lawn in front of the White House.