Yo-Yo Ma stopped by an elementary school in Anacostia this morning for two classes and a performance.

Fifty years ago, John F. Kennedy’s inauguration turned a generational tide in the United States, a watershed event being celebrated this month at the performing arts center named for him on the banks of the Potomac. Among those filled with hope for the future by the young president’s election were artists, writers and, not least, classical musicians, who welcomed his words about the importance of the arts to the life of the country.