sentences:  from Columbia in 1975, Libby joined the firm of Schnader, Harrison, Segal & Lewis LLP.He was admitted to the bar of the Commonwealth of Pennsylvania on October 27, 1976, and to the Bar of the District of Columbia Court of Appeals on May 19, 1978.Libby practiced law at Schnader for six years before joining the U.S. State Department policy planning staff, at the invitation of his former Yale professor, Paul Wolfowitz, in 1981.