Louise and Michael Toscano, mother and father of Brooklyn Public Library patron Vera Toscano, on their wedding day. The reception was at the Grand Paradise Ballroom in the Williamsburg neighborhood on May 9, 1926. The photo is now part of the "Culture in Transit" online collection. Courtesy of Vera Toscano/Brooklyn Public Library hide caption

itoggle caption Courtesy of Vera Toscano/Brooklyn Public Library

Texas billionaire H. Ross Perot laughs after saying, "Watch my lips," in response to reporters asking when he plans to formally enter the presidential race. Questions came May 5, 1992, in New York City, where Perot was speaking before the American Newspaper Publishers Association. Richard Drew/AP hide caption

itoggle caption Richard Drew/AP

Teaching American history in the contemporary classroom — and in the coming years — holds some particular, and complicated, challenges. (Space mural by Robert McCall, National Air and Space Museum) Eddie Brady/Lonely Planet Images/Getty Images hide caption

itoggle caption Eddie Brady/Lonely Planet Images/Getty Images