American Trauma Victims Association (ATVA) is a group brought in by the federal government to assist with victims of trauma. Dr. Stanley Keyworth (Adam Arkin) works with the organization. Previous work done by ATVA included the aftermaths of a pipe bomb explosion at Lancaster Middle School, Hurricane Beth, the Chatham fires, Iowa tornadoes, and the FBI raid in Rock Creek. ("Noel")
Keyworth is called to the White House on at least two separate occasions, the first in Noel, where he helps Josh and diagnoses him with Post-Traumatic Stress Disorder (PTSD), as a result of the Rosslyn shootings. The second time he meets with President Bartlet near the end of his first term, when the President is having trouble sleeping.