Rescue and recovery effort after the September 11 attacks on the World Trade Center

The September 11 attacks on the World Trade Center elicited a large response of local emergency and rescue personnel to assist in the evacuation of the two towers, resulting in a large loss of the same personnel when the towers collapsed. After the attacks, the media termed the World Trade Center site "Ground Zero", while rescue personnel referred to it as "the Pile".

In the ensuing recovery and cleanup efforts, personnel related to the metalwork and construction professions would descend on the site to offer their services and remained until the site was cleared in May 2002. In the years since, investigations and studies have examined effects upon those who participated, noting a variety of afflictions attributed to the debris and stress.