AndronETalksNews
ProPublica
by Sharon Lerner, photography by Haruka Sakaguchi, special to ProPublica
May 20, 6 a.m. EDT
Kris Hansen had worked as a chemist at the 3M Corporation for about a year when her boss, an affable senior scientist named Jim Johnson, gave her a strange assignment. 3M had invented Scotch Tape and Post-it notes; it sold everything from sandpaper to kitchen sponges. But on this day, in 1997, Johnson wanted Hansen to test human blood for chemical contamination.
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