Katherine Lee presenting

Chicago Section Chair Amy Balija as emcee, celebrating anniversary milestones.

Katherine Lee (L) handing certificate to 50-year ACS member Muin Shawki Haddad (center), with Amy Balija (R)

50-year ACS member Gwendalyn Champion Baumann (center), with speaker Katherine Lee (left) and Chicago Section ACS Chair Amy Balija (right)

Anna DeFilippi, daughter of 50-year ACS member Louis DeFilippi, enjoying her periodic table door prize