text:  A Capitol Fourth, the annual concert and fireworks display, will broadcast live from Washington, D.C. tonight. Smokey Robinson, Fantasia, and Darren Criss are among the performers. More from NPR's Elizabeth Blair. In addition to commemorating the nation's independence, two musical anniversaries will be celebrated. Pianist Chloe Flower will perform Gershwin's Rhapsody in Blue, which is marking its centennial.