Historian and author David McCullough, a Presidential Medal of Freedom recipient and two-time winner of the Pulitzer Prize and the National Book Award, will give a talk on Sept. 26 at 4 p.m. in Robsham Theater. He has written books on Harry S. Truman, John Adams, the Brooklyn Bridge, and the Wright brothers, among other topics. He is also a narrator, most notably of “The Civil War” by Ken Burns and the feature film “Seabiscuit.” His books, Truman and John Adams, have been adapted by HBO into a TV film and a miniseries, respectively. Boston College presented McCullough with an honorary degree at Commencement 2008. His speech from that day is included in the new book, The American Spirit: Who We Are and What We Stand For, a collection of his talks from the past 25 years. Note: Doors open at 3:30 p.m. and seating is based on a first-come, first-served basis. A book signing precedes his talk at 3 p.m. Sponsor: Winston Center for Leadership and Ethics/Clough Colloquium.