Contents
Smithsonian Institute Security Signals
| Code | Meaning |
|---|---|
| 1 | Secure all exits |
| 2 | Assault |
| 3 | Bomb Threat |
| 4 | Fire at … |
| 5 | Evacuate building |
| 6 | Emergency at … |
| 7 | Holdup alarm |
| 8 | Officer in trouble |
| Alpha | Natural History |
| Bravo | Arts & Industries |
| Charlie | American History |
| Delta | Portrait Gallery, Renwick Gallery |
| Echo | Air & Space |
| Foxtrot | Outpost detachment |
| Golf | Hirschhorn and garden |
| Hotel | Quad, Freer Gallery |
| Kilo | K-9 |
| White | All clear |