Congressman John Lewis (D-Georgia) began talking to his colleagues in 1986 about the need for a national museum of African-American culture. Most of the time, his exhortations were met with condescending smiles, stony silence, or even outright hostility from such famous Congressional bigots as Jesse Helms. But Lewis persevered, and last week, his dream was finally realized, as both houses of Congress approved the creation of the National Museum of African American History and Culture.