The National Association of Broadcasters announced the 50 finalists for the 28th Annual Crystal Radio Awards. Since 1987, the NAB Crystal Radio Awards have recognized radio stations for their outstanding year-round commitment to community service. Winners will be announced and the finalists will be honored at the NAB Radio Luncheon. The Luncheon, sponsored by ASCAP, will be held Tuesday, April 14 during the 2015 NAB Show in Las Vegas.