A Department of Justice memo [distributed by the FBI] instructs local police, under a program named Communities Against Terrorism," to consider anyone who harbors "conspiracy theories" about 9/11 to be a potential terrorist. The memo thus adds 9/11-official-story skeptics to a growing list of targets described by federal law enforcement [as] security threats, such as those who express "libertarian philosophies," "Second Amendment-oriented views," interest in "self-sufficiency," "fears of Big Brother or big government," and "Declarations of Constitutional rights and civil liberties." A newly released national poll shows that 48 percent of Americans either have some doubts about the official account of 9/11, or do not believe it at all. The FBI memo entitled "Potential Indicators of Terrorist Activities Related to Sleepers" says that people who should be 'considered suspicious' [for] possible involvement in "terrorist activity" include those who hold the "attitude" described as "Conspiracy theories about Westerners." The memo continues: "e.g. (sic) the CIA arranged for 9/11 to legitimize the invasion of foreign lands." "Sleepers" refers to "sleeper cells," in FBI jargon, which are terrorists awaiting orders to be activated into terrorist activity. According to the polling firm YouGov, 38% of Americans have some doubts about the official account of 9/11, 10% do not believe it at all, and 12% are unsure about it. Among well-known doubters of the official 9/11 account are many military officers, law enforcement personnel, firefighters, and pilots.