Dress Rehearsal for "A Capitol Fourth"

Darren Criss rehearses for "A Capitol Fourth" in Washington, July 3, 2012 (W. Workinger/VOA)

Host Tom Bergeron at the rehearsal for "A Capitol Fourth" in Washington, July 3, 2012 (W. Workinger/VOA)

Candace Glover performs at the dress rehearsal for "A Capitol Fourth" in Washington, July 3, 2013. (W. Workinger/VOA)

The crowd cheers for Neil Diamond at the rehearsal for "A Capitol Fourth" in Washington, July 3, 2012 (W. Workinger/VOA)

Barry Manilow performs at the rehearsal for "A Capitol Fourth" in Washington, July 3, 2012 (W. Workinger/VOA)

Barry Manilow performs at the rehearsal for "A Capitol Fourth" in Washington, July 3, 2012 (W. Workinger/VOA)