Friday’s performance was part of a larger shift. For the week, the Dow, S&P 500 and Nasdaq fell 2%, 2.9%, and 3.5%, respectively. Despite Telegram's origins, its approach to users' security has privacy advocates worried. Some privacy experts say Telegram is not secure enough "There are several million Russians who can lift their head up from propaganda and try to look for other sources, and I'd say that most look for it on Telegram," he said. NEWS
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