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1. Kennedy School dean David Ellwood introduces President Sirleaf.
2. Graduation Address
President Ellen Johnson Sirleaf, M.P.A. '71, of Liberia, Africa's first elected female president, delivers the 2008 graduation address at the Harvard Kennedy School.
Author and Harvard Divinity School writer-in-residence Terry Tempest Williams finds beauty in the world around us.
The retired government professor has been a rare conservative voice on campus for decades.
Nobel Prize recipient Joseph E. Murray dedicated much of his career to organ transplant surgery.
