https://www.reuters.com/article/us-apple-epic-games/apples-tim-cook-to-defend-app-store-at-trial-with-fortnite-maker-idUSKCN2D217K

Apple Inc Chief Executive Tim Cook on Friday will take the witness stand to defend the App Store, a booming part of the iPhone maker's business that "Fortnite" maker Epic Games says is a monopoly that Apple abuses.