'Police officers salute Stephanie Kwolek for inventing this vest material that's 5 times stronger than steel'
kevlar
SHE INVENTED WHAT?: Police officers salute Stephanie Kwolek for inventing this vest material thats 5 times stronger than steel
Police officers salute Stephanie Kwolek for inventing this vest material that's 5 times stronger than steel
Police officers salute Stephanie Kwolek for inventing this vest material that's 5 times stronger than steel
SHE INVENTED WHAT?
kevlar
SHE INVENTED WHAT?