DuPont chemist Stephanie Kwolek, inventor of body army component Kevlar, dies at 90

DOVER, Del. — Police Lt. David Spicer took four .45-caliber slugs to the chest and arms at point-blank range and lived to tell about it. Like thousands of other police officers and soldiers shot in the line of duty, he owes his life to a woman in Delaware by the name of Stephanie Kwolek.

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