Opasnosti

Opasnosti (アパースナスチ), also known as Nu-AD1967, is a former Soviet Union strategic nuclear warhead.

World War III Arc
Misaka 10777 intercepts information about a man named Nikolai Tolstoy and a large-scale surface attack against the flying fortress involving the Nu-AD1967 or the Opasnosti, a former Soviet Union strategic nuclear warhead.