This work was supported by award MIPT106-113-2000-020 from the Oklahoma City National Memorial Institute for Prevention of Terrorism (MIPT) and the Office of Justice Programs, National Institute of Justice, U.S. Department of Justice (DOJ) to Dr. Pfefferbaum and by grants MH40025 and MH68853 from the National Institute of Mental Health (NIMH) awarded to Dr. North. The views expressed are those of the authors and do not necessarily represent the official position of the MIPT, DOJ, NIMH, U.S. Department of Veterans Affairs, or U.S. government.
The authors report no competing interests.