An actress nominated for 20 academy awards was featured on a TV series about genealogical research of 12 americans hosted by whom?
Faces of America: Faces of America is a four-part Public Broadcasting Service (PBS) Public television television series hosted by Professor Henry Louis Gates. Faces of America:  The series originally aired February 10 – March 3, 2010 from 8–9 p.m. ET. Meryl Streep:  Nominated for 20 Academy Awards, Streep has more nominations than any other actor, and is one of the six actors to have won three or more competitive Oscars for acting.
Professor Henry Louis Gates