The names of the 2,983 people who were killed in the 2001 and 1993 terrorist attacks are inscribed on bronze parapets edging the memorial pools. The names are grouped by the locations and circumstances in which victims found themselves during the attacks. The North Pool parapets include the names of those who were killed at the North Tower, on hijacked Flight 11, and in the 1993 bombing. The South Pool parapets include the names of first responders as well as victims who were killed at the South Tower, on hijacked Flight 175, at the Pentagon, on hijacked Flight 77, and on hijacked Flight 93.

Within these groupings, names are arranged in a system of “meaningful adjacencies.” Friends and colleagues appear together, as well as the crews of each of the four flights and first responder agencies and units. Additionally, during the Memorial’s development, victims’ next of kin were invited to request that their loved ones’ names be inscribed alongside specific others. In this way, those who were connected in life reside together on the Memorial.

More than 400 swamp white oak trees fill the Memorial plaza around the pools. This hardy species of tree is native to the areas of all three 9/11 crash sites: New York City; Arlington, Virginia; and Somerset County, Pennsylvania.