https://www.reuters.com/article/us-hongkong-protest-cook/apples-cook-defends-decision-to-remove-police-tracking-app-used-in-hong-kong-idUSKBN1WP2SZ >Apple Inc Chief Executive Tim Cook on Thursday defended the iPhone maker's decision to remove a police-tracking app used by protesters in Hong Kong from its App Store, according to a copy of the letter seen by Reuters and confirmed by Apple.