Two exhibits of note have opened on the East Coast. "American Diner: Then and Now," at the Museum of Our National Heritage in Lexington, Mass., through July 30, re-creates the American lunch counter of the '20s through drawings, photographs, menu boards. Above, the Boulevard Diner in Worchester, Mass. Information, (617) 861-6559. At the National Portrait Gallery in Washington, "Majestic in His Wrath: The Life of Frederick Douglass," marking the 100th anniversary of Douglass' death, will be on display through Nov. 19. More than 80 items, including the 1850 daguerreotype, above, provide a portrait of the one-time slave who became a leader of the abolitionist movement. Information: (202) 357-2700.