Sandra Day O'Connor made history when she became the first woman to serve on the Supreme Court in 1981. Former President Ronald Reagan appointed her to the position and the Senate confirmed her unanimously. During her nearly 25 years on the country's highest court, O'Connor was considered by many to be the most powerful woman in America. Author Evan Thomas joins "CBS This Morning" to discuss his new book, "First: Sandra Day O'Connor, an American Life." It gives what the New York Times calls a "fascinating and revelatory" portrait of the justice, both on the bench and off.