This is the control panel of the nuclear reactor that made the plutonium for the Nagasaki bomb.
In the main control room of B Reactor, workers used pressure indicators to monitor the temperature of water pumped from the Columbia to cool the reactor. A "SCRAM" is an emergency shutdown of a nuclear reactor.
"If you've got to resist, your chances of being hurt are less the more lethal your weapon. If that were my wife, would I want her to have a .38 Special in her hand? Yeah." - Dr. Arthur Kellermann, Health Magazine (March/April 1994) p 61