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Charles Perfetti is a Distinguished University Professor of Psychology, and Senior Scientist and Director of the Learning Research and Development Center at the University of Pittsburgh.

Gary E. Knell is President and Chief Executive Officer of Sesame Workshop. Knell leads the nonprofit educational organization in its mission to create innovative, engaging content that maximizes the educational power of all media to help children reach their highest potential. In his role, Knell has been instrumental in focusing the organization on Sesame Street's global mission, including groundbreaking coproductions in South Africa, Russia, China, and Egypt. Previously, Knell was Managing Director of Manager Media International. In this capacity, he oversaw the development of the monthly business magazine Asia Inc., the daily Asian-based newspaper Asia Times, and several trade publications. He also has served as Senior Vice President and General Counsel at WNET/Channel 13 in New York, was Counsel to the US Senate Judiciary and Governmental Affairs Committees, and worked in the California State Legislature and Governor's Office. Knell is a member of the Council on Foreign Relations and a participant in the Aspen Institute Forum on Communications and Society as well as the Columbia University American Assembly. He serves on the Board of the Zimmer Children's Museum in Los Angeles; The Kitchen, a performing arts center in New York City; and National Video Resources. He also serves on the Board of Governors of the American Center for Children and Media as well as the Advisory Board for the Music Educators National Conference.

Annick Smith (born 1936) is a writer and filmmaker whose work often focuses on the natural world. The daughter of Hungarian migrs, Smith was born in Paris and raised in Chicago, Illinois. In 1964, she moved to Montana, where she and her husband and sons eventually settled on a 163-acre ranch in the Blackfoot River valley. Her husband died from heart failure in 1974, but Smith remained on the land to raise her sons. Among her books are *Homestead*, *Big Bluestem*, and *In This We Are Native*. She also co-edited an anthology of *Montana writing*, *The Last Best Place*. Her travel writing and essays have appeared in journals such as *Audubon*, *Outside*,* Islands*, *Travel + Leisure*, and *National Geographic Traveler*. Smith served as executive producer of the film* Heartland* and co-producer of *A River Runs Through It*, directed by Robert Redford. She was also a founding board member of Redfords Sundance Institute.

After graduating, Goldstone practiced as an advocate at the Johannesburg Bar. In 1976 he was appointed senior counsel and in 1980 was made a judge of the Transvaal Supreme Court. In 1989 he was appointed to the Appellate Division. From 1991 to 1994 he served as the chairperson of the Commission of Inquiry Regarding Public Violence and Intimidation, which came to be known as the Goldstone Commission. He served as a judge of the Constitutional Court of South Africa from July 1994 to October 2003. From 15 August 1994 to September 1996 he served as the chief prosecutor of the United Nations' International Criminal Tribunals for the former Yugoslavia and Rwanda. From August 1999 until December 2001 he was the chairperson of the International Independent Inquiry on Kosovo. In December 2001 he was appointed the co-chairperson of the International Task Force on Terrorism, which was established by the International Bar Association. In April 2004 the secretary-general of the United Nations appointed Goldstone to the independent committee to investigate the Iraqi oil-for-food program (the Volcker Committee). In October 2007 he was appointed by the Registrars of the United Nations International Criminal Tribunals for the former Yugoslavia and Rwanda to chair an Advisory Committee on the Archiving of the Documents and Records of the two tribunals.

Deborah Rothschild is Senior Curator of Modern and Contemporary Art at the Williams College Museum of Art in Williamstown, Massachusetts. She earned her Ph.D. and MA at the Institute of Fine Arts, New York University. She also received a certificate in museum studies from the Metropolitan Museum of Art. Her dissertation, which examined Picasso's use of popular imagery in his designs for the ballet between 1917 and 1924, served as the basis of her book *Picasso's Parade: From Street to Stage* (1991), which also accompanied an exhibition held at the Drawing Center in New York in April 1991. This publication was acclaimed in the* New York Times* and cited as one of the top five art books of the season by the *Wall Street Journal*. A specialist in early 20th century and contemporary art, Dr. Rothschild is a Phi Beta Kappa and summa cum laude graduate of Vassar College. In 1982 she received the Theodore Rousseau Fellowship for research abroad from The Metropolitan Museum of Art. She has overseen more than 50 exhibitions, organizing shows of work by James Turrell, David Hammons, Adrian Piper, Tony Oursler and many other living artists as well as numerous historical exhibitions. She has contributed articles and reviews to *The Metropolitan Museum Journal*, *The Art Journal*, *The Virginia Quarterly Review*, *Arts Magazine*, and *Gastronomica*.

In his 24 years as head of Environmental Defense Fund, Fred Krupp has overseen the growth of EDF from a small nonprofit with budget of $3 million into a recognized worldwide leader in the environmental movement. Krupp is widely recognized as the foremost champion of harnessing market forces for environmental ends, such as the market-based acid rain reduction plan in the 1990 Clean Air Act. Today, this approach has become the leading model for solving the problem of global warming. Krupp broke new ground by engaging American companies to lessen their impact on the environment. Strategic partnerships with McDonald's, FedEx, and DuPont, among others, have resulted in the elimination of millions of pounds of waste, the adoption of hybrid delivery vehicles, and an accord to reduce the environmental risks of nanotechnology. He also helped launch a corporate coalition, the US Climate Action Partnership, whose Fortune 500 members Alcoa, BP, Caterpillar, GE and dozens more have called for strict limits on global warming pollution. Krupp is coauthor, with Miriam Horn, of the *New York Times* best seller, *Earth: The Sequel The Race to Reinvent Energy and Stop Global Warming*, published in March 2008 by W.W. Norton.