Liberal talk gives way to - jack rock? Tuesday's demise of the progressive talk format on KKNS 105.9 FM in Missoula, was the first major change instituted by Salt Lake City-based Simmons Media Group, which took over management of three radio stations run by Mount Sentinel Broadcasting about six weeks ago. Simmons laid off the station's three-person news staff and switched KKNS late Tuesday to a “jack format,” a term meaning a variety of Top 40, hair band, rock and pop music. Simmons vice president of operations Alan Hague declined to discuss terms of the deal to acquire the lease...