Original: On December 11, 2008, Carter celebrated his 100th birthday at Carnegie Hall in New York, where the Boston Symphony Orchestra and pianist Daniel Barenboim played his Interventions for Piano and Orchestra from 2008.
Simplified: He recently composed a piece called Interventions for Piano and Orchestra which was given its first performance in the Symphony Hall, Boston where it was played by the Boston Symphony Orchestra conducted by James Levine with the pianist Daniel Barenboim as soloist. The same players played it again a week later on 11 December 2008 in the Carnegie Hall, New York to celebrate Carter's 100th birthday.