Country music’s biggest names are heading back to Butler County this summer. The Voices of America Country Music Festival will hold its fourth annual event Aug. 6-9 at the National Voice of America Museum of Broadcasting and Voice of America MetroPark grounds, located at 7850 VOA Park Dr. in West Chester Township, Ohio. Headliners Brad Paisley, Rascal Flatts, Blake Shelton, and Jordan Davis will anchor the four-day celebration, which also marks America’s 250th birthday…