1. A circuit to detect an event, comprising: one or more event sensors, each event sensor adapted to identify a respective event dangerous to a plurality of people and to generate a respective event sensor signal, wherein the one or more event sensors includes one or more of a chemical sensor, a biological sensor, a radiological sensor, a nuclear sensor, an explosive sensor, an explosion sensor, or a seismic sensor; a signal processor coupled to receive one or more event sensor signals for the one or more event sensors, to process the one or more event sensor signals, and to generate a processed output signal indicative of a respective one or more events, wherein the processed output signal includes an installation date and a maintenance date associated with the at least one of the one or more event sensors, wherein the event includes at least one of a nuclear event, a radiological event, a biological event, a chemical event, an explosive event, an explosion event, or an earthquake event; an existing sensor processor coupled to the signal processor to receive one or more existing sensor signals from a respective one or more existing sensors disposed remotely from the common circuit board assembly and to generate an existing sensor output signal, wherein the one or more existing sensors includes one or more of a global positioning system, a speed sensor, a real-time clock, a direction sensor, an altitude sensor, a wind speed sensor, a wind direction sensor, or a humidity sensor; a time stamp processor coupled to the signal processor to receive a time stamp signal and to generate a time stamp output signal indicative of one or more respective times of occurrence of the one or more events; and an interface processor coupled to the signal processor and adapted to format the processed output signal as an event signal indicative of the one or more events, wherein the one or more event sensors, the signal processor, the existing sensor processor, the time stamp processor, and the interface processor are mounted in a common circuit board assembly.