 Westinghouse purchased CBS for $5.4 billion on August 1, 1995, resulting in all of the CBS-affiliated Group W stations becoming CBS O&Os when the sale was completed that November.This merger deal came just one day after The Walt Disney Company announced that it would acquire Capital Cities/ABC, parent company of rival ABC.Viacom bought Westinghouse/CBS for $36 billion in September 1999, which created duopolies in several markets between O&Os of CBS and UPN.