Tim Cook to be Apple's star witness at Fortnite trial

Apple CEO Tim Cook will take the witness stand Friday in a high-stakes courtroom battle that could change the iPhone and App Store forever. 

Cook's testimony is expected to start at 8 a.m. Pacific Time. The U.S. District Court in Oakland, California, doesn't allow cases to be televised, or for audio to be rebroadcast, but the testimony will be available live via a phone line, and the details are here. The trial revolves around an antitrust lawsuit filed last year by Epic Games, the maker of Fortnite. At stake are the lucrative commissions the iPhone maker has been raking in from its mobile app store and players' access to the popular shootout game.