https://www.reuters.com/article/us-apple-epic-games/apples-tim-cook-says-threat-profile-of-iphone-justifies-app-store-rules-idUSKCN2D217K >(Reuters) -Apple Inc Chief Executive Tim Cook on Friday told a court the 'threat profile' of the iPhone required tight control of the App Store, which "Fortnite" game maker Epic Games says is a monopoly that Apple abuses.