Ceremonies to remember the victims of the September 11, 2001, terrorist attacks in the United States took place in the country on Friday, the eve of the 20th anniversary of the incidents.
A memorial in New York honored firefighters and police officers who died in the collapse of the World Trade Center towers after they were hit by hijacked aircraft.
Photographs of more than 400 victims were posted on walls of the venue. Visitors offered carnations.
A woman who lost her firefighter father said her wound has never healed since his death.
Another ceremony in the eastern state of Pennsylvania paid tribute to 40 people who lost their lives when their hijacked plane crashed in a field.
Relatives and friends lit candles at a cenotaph bearing the victims' names.