Stocks dropped on Friday afternoon, as gains made earlier in the day on hopes for diplomatic progress between Russia and Ukraine turned to losses. Technology stocks were hit particularly hard by higher bond yields. For example, WhatsApp restricted the number of times a user could forward something, and developed automated systems that detect and flag objectionable content. READ MORE Despite Telegram's origins, its approach to users' security has privacy advocates worried. Such instructions could actually endanger people — citizens receive air strike warnings via smartphone alerts.
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