Sen. John McCain (R-Ariz.); cellist Yo-Yo Ma; a performance by ballerina Misty Copeland.Sen. John McCain (R-Ariz.); cellist Yo-Yo Ma; a performance by ballerina Misty Copeland.Sen. John McCain (R-Ariz.); cellist Yo-Yo Ma; a performance by ballerina Misty Copeland.