The Defense Protective Service (DPS)—the law enforcement agency that guards the Pentagon—arrests three people at the Pentagon who are dressed in firefighting gear but are not firefighters. Further details of who these people are and why they are at the Pentagon are unstated. John Jester, the chief of the DPS, later reflects: “When you have a major event, certain people are like moths around a light bulb. They come to the scene as thrill seekers.” Reportedly, incident command, DPS, and FBI officials are worried by the “absence of an effective identification system to control the large number of people that [are passing] through the outer perimeter fence to support firefighting and recovery operations” at the Pentagon. [Goldberg et al., 2007, pp. 170]