On Sept. 8, the Smithsonian’s National Museum of American History will acquire donations from both artists for their contributions to American music, including their Oscar-nominated song, “The Empty Chair,” from the documentary Jim: The James Foley Story about the American photojournalist who was captured and killed in Syria. Sting, a 16-time Grammy winner, and Ralph, a triple-Oscar nominee, will join Dan Rather for a discussion, followed by performances from Sting and the world premiere of Ralph’s new symphonic piece, “Evolocean"...