At the invitation of DOE, an IRO staff member observed the DOE/FBI "Quiet Storm" exercise conducted at Oak Ridge. The primary objective was to exercise the establishment and operations of selected elements the FBI field response. This included the establishment of a Command Post and tactical teams (e.g., SWAT). The FBI deployed about 300 agents and support personnel to staff these operational elements for two shifts. The Command Post required 2000-3000 sq. ft. of space and included numerous DOE liaisons. The field elements that would provide technical assessment (e.g., hazmat assessment and response) or coordination of public information (e.g., Joint Information Center) were not exercised. If all the elements of the FBI field response were deployed, the total size of each FBI shift at the scene could exceed 200. A similar level of FBI response is expected in the event of a protracted terrorist event at an NRC licensed facility.