Tracy also promoted a crisis actor conspiracy theory of the Boston Marathon bombing.[11][12] Conspiracy theorists have claimed such attacks are "false flag operations" staged by conspirators, usually government or corporate forces, in order to achieve some goal such as justifying increased government surveillance, disarmament of the population, or military action against blamed nations or groups. Crisis actors are claimed in this context to play the part of bystanders or witnesses, emergency response personnel, and (with the aid of stage makeup) wounded victims of the attack.