But exactly what characterizes “suspicious behavior” or “suspicious activity” as it relates to terrorism? Here are some suggestions, according to the FBI:
Certain kinds of activities can indicate terrorist plans that are in the works, especially when they occur at or near high profile sites or places where large numbers of people gather such as government buildings, military facilities, utilities, bus and train stations or major public events. Quick reporting is essential. That may mean reporting to the closest Joint Terrorist Task Force, located in a local FBI field office.