Check out this post in the South Korea vibe:
South Korea developing graphite 'blackout bombs' to paralyse North's electrical
grid
[1]https://www.yahoo.com/newsroom/vibes/south-korea/v-50a3291a-1aa0-3389-b071-c2
3ae7c7394b_c-629d6357-e0fd-316b-8ace-1c014e1e774f_a-629d6357-e0fd-316b-8ace-1c01
4e1e774f

   [2]Sent from Yahoo Mail on Android

References

   1. https://www.yahoo.com/newsroom/vibes/south-korea/v-50a3291a-1aa0-3389-b071-c23ae7c7394b_c-629d6357-e0fd-316b-8ace-1c014e1e774f_a-629d6357-e0fd-316b-8ace-1c014e1e774f
   2. https://overview.mail.yahoo.com/mobile/?.src=Android