David S. Katz is a former senior special agent with the Drug Enforcement Administration. He is an expert in conducting complex international criminal investigations, high-risk arrests, undercover operations, physical and technical surveillance, and intelligence analysis. He also spent four years as a primary firearms instructor at the FBI/DEA Academy, where he taught firearms and tactics. In addition, he is an expert in physical site security and the tactical use and deployment of bullet and explosive-resistant armor and glass. Ilan Caspi is a former senior Israeli Secret Service officer