People across the United States and around the world are marking the third anniversary of the September 11th terrorist attacks with vigils, religious services and other ceremonies.
On Saturday, parents and grandparents of the victims of the attacks will read the names of those killed at a ceremony at the site of the World Trade Center. New York City will end the day with the "Tribute in Light" at sundown which will feature two beams of light representing the Twin Towers.
U.S. Defense Secretary Donald Rumsfeld will lead a wreath-laying ceremony at Arlington National Cemetery, outside Washington, to honor the victims of the attack on the nearby Pentagon.
And in Shanksville, Pennsylvania, people will gather at the site where United Airlines Flight 93 went down.
Other services are planned around the world. On Friday, flowers were laid in a memorial garden near the American Embassy in London.