John P. Sullivan is a researcher specializing in terrorism, conflict, urban operations, intelligence studies and the intersection between war and crime. He is currently a sergeant with the Los Angeles Sheriff’s Department, where he serves as officer-in-charge of the Los Angeles Terrorism Early Warning Group. His current research focus is the development of networked counterterrorism and global security measures and military-police interaction in constabulary operations. He is the lead editor of Jane’s Unconventional Weapons Response Handbook (2002) and has written for various law enforcement and military publications.