The Comcast-NBC Merger Is Set for a Capitol Hill Grilling

Top executives from Comcast (CMCSA), the nation's largest cable company, and NBC Universal, the storied entertainment giant, are set to appear Thursday before Congress, as lawmakers and regulators examine the companies' proposed $30 billion new-media mega-merger. Critics worry the pact would put too much media power in one firm's hands, stifle local content and threaten the nascent online video market.