Huge powergrid, blackout in#Yalta, south coast of the Crimean Peninsula.
source:
https://twitter.com/RT_com/status/1354043913066016768

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"Yalta, A Secure Collaborative Space
(...) (4) Support use of the collaborative space as a coordination channel for setting up other special communications. (...) very high-bandwidth data exchange or encrypted communication using non-standard algorithms."
source: https://www.researchgate.net/publication/2877124_Yalta_A_Secure_Collaborative_Space