• 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