Dear DHS: Domestic Security

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