American Classics. Marin Alsop, a champion of American music, pairs Samuel Barber’s unabashedly Romantic First Symphony with Copland’s dramatic evocation of the nation’s 16th President, narrated by Baltimore’s own Kwame Kwei-Armah. And the greatest concerto in the cello literature, an exquisite tribute to a dying first love, was also written in America, after the Czech composer Antonin Dvorák moved here from his native Moravia. Johannes Moser brings this concert to a rousing conclusion.