When domestic terrorists detonated a bomb in the federal building in Oklahoma City on April 19, 1995, they killed 168 people including 19 children in the building's day care center. The next day, Oprah went to Oklahoma City. In a local hospital she visited Brandy Ligon, the last survivor pulled from the rubble. She also spoke with Michael Treanor, whose parents and 4-year-old daughter Ashley were killed in the attack.
Read what happened when Oprah followed up with survivors of the attack in 2009