WorldNames of 9/11 victims read at New York memorial ceremony

Americans marked the 25th anniversary of the deadliest attack on U.S. soil by mourning nearly 3,000 people killed at the World Trade Center, the Pentagon and in Pennsylvania. At Ground Zero, relatives began reading the names of the 9/11 victims and those killed in the 1993 World Trade Center bombing, while ceremonies were also held at the Pentagon and in Shanksville.