Thousands are gathered today in New York, Washington and Pennsylvania to mark the 11th anniversary of the Sept. 11 attacks.
At Ground Zero in lower Manhattan, only the families of the more than 2,750 people who were killed are reading their names. In previous years, politicians have participated in the reading of the names, or have read from the Bible or recited passages from literature, NBC News reports.
Photo: 1 World Trade Center, left, the National September 11 Memorial, bottom left, and 4 World Trade Center, right, are bathed in light on Sept. 11, 2012, in New York. (Mark Lennihan / AP)