[yndgcwpj] Preparing to survive salted bombs

Consider it inevitable that someone will detonate salted nuclear weapons, e.g., cobalt bombs, in the near future, say, within the next 10,000 years, which, unless we prepare for it, will cause the extinction of the human race in that same timeframe.

Assuming so, we need to put research and development into surviving such a bombing, probably developing sealed shelters which can completely provide for a small population for 100 to 200 years.

Colonizing Mars, other planets, or the moon, or building self-sustaining space stations is one possibility.

Several difficulties: Whatever conflict or situation that induced the detonation of such bombs could persist or be widespread enough that the shelters could come under attack, perhaps by nuclear armed powers.

An agent so bent on causing human extinction as to detonate such salted bombs could program more hidden bombs to go off once a century, leaving the planet uninhabitable for another cycle.  An even more sinister attacker could program an autonomous factory to continue to build then detonate such bombs indefinitely, though defending such a factory (and its supply lines) might be a challenge.