In October 2001, President Bush issued Executive Order 13231, a secret presidential order authorizing the NSA to conduct a range of surveillance.
Ref: https://en.wikisource.org/wiki/Executive_Order_13231

The DHS has compiled a list of "bad words" for their computers to search for in domestic electronic communications. Just using these words in your email or voice communications, may cause the black helicopters to appear above your home.

Department of Homeland Security National Operations Center Media Monitoring word list
Ref: http://epic.org/foia/epic-v-dhs-media-monitoring/Analyst-Desktop-Binder-REDACTED.pdf

Assassination Attack Domestic security Drill Exercise Cops Law enforcement Authorities Disaster assistance Disaster management DNDO (Domestic Nuclear Detection Office) National preparedness Mitigation Prevention Response Recovery Dirty bomb Domestic nuclear detection Emergency management Emergency response First responder Homeland security Maritime domain awareness (MDA) National preparedness initiative Militia Shooting Shots fired Evacuation Deaths Hostage Explosion (explosive) Police Disaster medical assistance team (DMAT) Organized crime Gangs National security State of emergency Security Breach Threat Standoff SWAT Screening Lockdown Bomb (squad or threat) Crash Looting Riot Emergency Landing Pipe bomb Incident Facility Outbreak Contamination Exposure Virus Evacuation Bacteria Recall Ebola Food Poisoning Foot and Mouth (FMD) H5N1 Avian Flu Salmonella Small Pox Plague Human to human Human to Animal Influenza Center for Disease Control (CDC) Drug Administration (FDA) Public Health Toxic Agro Terror Tuberculosis (TB) Agriculture Listeria Symptoms Mutation Resistant Antiviral Wave Pandemic Infection Water/air borne Sick Swine Pork Strain Quarantine H1N1 Vaccine Tamiflu Norvo Virus Epidemic World Health Organization (WHO) (and components) Viral Hemorrhagic Fever E. Coli Infrastructure security Airport Airplane (and derivatives) Chemical fire CIKR (Critical Infrastructure & Key Resources) AMTRAK Collapse Computer infrastructure Communications infrastructure Telecommunications Critical infrastructure National infrastructure Metro WMATA Subway BART MARTA Port Authority NBIC (National Biosurveillance Integration Center) Transportation security Grid Power Smart Body scanner Electric Failure or outage Black out Brown out Port Dock Bridge Cancelled Delays Service disruption Power lines Drug cartel Violence Gang Drug Narcotics Cocaine Marijuana Heroin Border Mexico Cartel Southwest Juarez Sinaloa Tijuana Torreon Yuma Tucson Decapitated U.S. Consulate Consular El Paso Fort Hancock San Diego Ciudad Juarez Nogales Sonora Colombia Mara salvatrucha MS13 or MS-13 Drug war Mexican army Methamphetamine Cartel de Golfo Gulf Cartel La Familia Reynosa Nuevo Leon Narcos Narco banners (Spanish equivalents) Los Zetas Shootout Execution Gunfight Trafficking Kidnap Calderon Reyosa Bust Tamaulipas Meth Lab Drug trade Illegal immigrants Smuggling (smugglers) Matamoros Michoacana Guzman Arellano-Felix Beltran-Leyva Barrio Azteca Artistic Assassins Mexicles New Federation Terrorism Al Qaeda (all spellings) Terror Attack Iraq Afghanistan Iran Pakistan Agro Environmental terrorist Eco terrorism Conventional weapon Target Weapons grade Dirty bomb Enriched Nuclear Chemical weapon Biological weapon Ammonium nitrate Improvised explosive device IED (Improvised Explosive Device) Abu Sayyaf Hamas FARC (Armed Revolutionary Forces Colombia) IRA (Irish Republican Army) ETA (Euskadi ta Askatasuna) Basque Separatists Hezbollah Tamil Tigers PLF (Palestine Liberation Front) PLO (Palestine Liberation Organization) Car bomb Jihad Taliban Weapons cache Suicide bomber Suicide attack Suspicious substance AQAP (AL Qaeda Arabian Peninsula) AQIM (Al Qaeda in the Islamic Maghreb) TTP (Tehrik-i-Taliban Pakistan) Yemen Pirates Extremism Somalia Nigeria Radicals Al-Shabaab Home grown Plot Nationalist Recruitment Fundamentalism Islamist