U.S. Supreme Court Associate Justice Harry A. Blackmun will give the UC Davis law school commencement address on Saturday, May 22. Justice Blackmun, 84, wrote the court's 1973 majority decision in Roe v. Wade, the landmark case in which a woman's right to decide whether or not to bear a child was guaranteed under the 14th Amendment to the U.S. Constitution. The School of Law's 25th commencement ceremony begins at 1:30 p.m. and will be held in the UC Davis Recreation Hall.