SLIS colloquium Series. This presentation explores some of the social trends that provide challenges and opportunities for libraries and librarians in the 21st century. It also touches upon some initiatives currently underway at the Library of Congress, America's Center of Knowledge, to provide leadership for the nation and the world.Recently appointed Associate Librarian for Library Services at the Library of Congress, Roberta served as adjunct coordinator of the law librarianship specialization at SLIS while concurrently directing research services at the law firm of Covington and Burling. Her rich and diverse background includes a year as Fulbright Senior Research Scholar at the Tel Aviv University Faculty of Law; service as dean and professor at the Graduate School of Library and Information Science at the University of Texas at Austin, as executive director of the Federal Library and Information Center Committee/Federal Library Network (FLICC/FEDLINK), and as the 22nd Law Librarian of Congress. Shaffer earned her A.B. at Vassar College; her M.L.S. at Emory University, and J.D. at Tulane University School of Law.