NAB-ster: Nexstar Chairman/CEO Perry Sook has been elected chairman of the National Association of Broadcasters (NAB) Joint Board of Directors. He succeeds outgoing chairman David Santrella. Concurrently elected are Cumulus EVP/Strategy & Development Collin Jones as Radio Board Chair; Perry Publishing & Broadcasting Pres./COO Kevin Perry as Radio Board first vice chair; Zimmer Media Pres. John Zimmer as Radio Board second vice chair and Beasley EVP & General Counsel Chris Ornelas to the NAB Board's Executive Committee as group representative for the Radio Board.