There is no “button” that could be accidentally hit. There are five fail safe procedures in the Hawaiian Emergency Alert Management System, the last being a two key system such as are present in US missile silos and on US nuclear missile submarines. Two keys, eight feet apart, requiring two different individuals to simultaneously and positively trigger the alert.
http:// exopolitics.org/was-a-nuclear-missile-attack-on-hawaii-thwarted-by-a-secret-space-program/