Christoph Escenbach conducts the NSO and guest pianist Tzimon Barto in Gershwin's Piano Concerto, plus a few pieces from Bernstein. Then, actor Richard Dreyfuss reads texts from President Kennedy's speeches and writings as the orchestra performs Peter Lieberson's Remembering JFK (An American Elegy), a piece commissioned by the NSO. Saturday, Jan. 22, at 8 p.m., Sunday, Jan. 23, at 1:30 p.m., and Monday, Jan. 24, at 7 p.m. An AfterWords discussion with Eschenbach, Dreyfuss, Barto and others follows the Sunday performance. Kennedy Center Concert Hall. Tickets are $20 to $85. Call 202-467-4600 or visit kennedy-center.org.