See my article about the misuse of 'insecure' instead of 'unencrypted'

Picture:
Detonation of 500 metric tons of TNT on Kaho'olawe Island during Operation Sailor Hat

CC commons.wikimedia.org/wiki/File:TNT_detonation_on_Kaho%27olawe_Island_during_Operation_Sailor_Hat,_shot_Bravo,_1965.jpg