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0:56
Watch Soledad O'Brien in "The Irish Factor," Finding Your Roots: Season Three.
5:17
Watch Bill O'Reilly in "The Irish Factor," Finding Your Roots: Season Three.
0:23
Secrets encoded in their genomes challenge guests’ ideas about their family histories.
0:23
Explores the family histories of three influential Greek-American personalities.
2:39
Tina Fey discovers her 5th Great-Grandfather, once an esteemed guest of Ben Franklin.
2:04
Henry Louis Gates, Jr. uncovers the immigrant plight of Sting's 3rd Great-Grandfather.
2:55
George Stephanopoulos learns that his Great-Grandfather resisted Nazi occupation in WW2.
2:58
David Sedaris discovers his maternal 4th Great-Grandfather, a Revolutionary War soldier.
2:52
Sally Field meets her devoted Tory ancestors, loyal throughout the Revolutionary War.
1:57
Watch Bill Maher in "The Irish Factor," Finding Your Roots: Season Three.
3:13
Jessica Alba learns more about her Mexican-American family's immigration experience.
3:09
Expert CeCe Moore uses Autosomal DNA analysis to trace Deval Patrick's family history.
