Andrea Booher arrived at Ground Zero on Sept. 12, 2001. She was part of a team including photographers and videographers dispatched by the Federal Emergency Management Agency (FEMA). Booher immediately began documenting the determined efforts to locate survivors in the wreckage of the World Trade Center site. Her photographs capture the tenacity of the men and women of Ground Zero who worked night and day hoping to find signs of life in the debris. As weeks passed, search and rescue work gave way to the recovery of those who had been killed. Booher continued to photograph the evolving landscape of Ground Zero, as well as the diversity and dedication of the people she met there.