#Civil defense siren

Author: Lewin Day / Source: Hackaday Some say the spectre of global nuclear annihilation is closer than ever before. What better time to head to the workshop to prepare for the coming apocalypse? [MrExpert] is here with the build you need – an air raid siren you can print at home. It’s a simple

Authored by Mac Slavo via SHTFplan.com, The previously retired air raid warning sirens from the Cold War era in Hawaii will be wailing again come December. Only this time, it’s due to the rising tensions between the United States and North Korea. Hawaii has long been a military defense outpost,