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US makes strongest-ever armor material with 100 trillion bonds/cm²
(interestingengineering.com)
This is a most excellent place for technology news and articles.
Good news, it costs 2 million dollars per square foot, so they won't militarise the police further with it.
Well not immediately… Years from now when the military develops something even better then this will all become surplus and sold off to SWAT teams etc. for next to nothing.