https://en.wikipedia.org/wiki/Permissive_Action_Link#Usage_b...
Rather we use hand-written letters and a lot of trust:
https://en.wikipedia.org/wiki/Letters_of_last_resort
https://en.wikipedia.org/wiki/Permissive_Action_Link#Usage_b...
Rather we use hand-written letters and a lot of trust:
https://en.wikipedia.org/wiki/Letters_of_last_resort