Carol S. North, M.D., has studied some of the seminal moments of American history. Through her efforts, she has helped to establish and define the unique niche of disaster medicine in psychiatry. Dr. North has scientifically investigated more than 3,000 survivors of major disasters, including the bombings of the Alfred P. Murrah Federal Building in Oklahoma City and the U.S. Embassy in Nairobi, Kenya; Hurricane Katrina; the Capitol Hill anthrax attacks; and the terrorist attacks from September 11, 2001, on the World Trade Center in New York. She developed disaster mental health training programs called Practical Front Line Training for Assistance, Support and Healing (P-FLASH) that have trained more than 5,000 professionals in the New York City area since 9/11 via the September 11th Fund, and many other thousands nationally. Her latest work focused on the 9/11 events and survivors, bringing clarity and research rigor to some of the speculative claims that evolved about how widespread post-traumatic stress disorder (PTSD) became after that event. The 9/11 events raised an interesting question for the mental health community, as coverage of the terrorist attacks played and replayed on television, exposing millions to images of the disaster.