Explanation:

Janet Yellen
US Treasury Secretary Janet Yellen is the first woman to head the Treasury and chair the US Federal Reserve. She unveiled the first US banknotes printed with two women's signatures. The new banknotes were being produced at the Treasury’s Bureau of Engraving and Printing (BEP) site. USD 1 and USD 5 bills were printed with signatures of Yellen and US Treasury Chief Lynn Malerba, the first Native American to serve in that role.