In this July 21, 2019, photo, a speedboat of Iran's Revolutionary Guard moves around a British-flagged oil tanker Stena Impero, which was seized on Friday by the Guard, in the Iranian port of Bandar Abbas. The assault on the beating heart of Saudi Arabia’s vast oil empire follows a new and dangerous pattern that’s emerged across the Persian Gulf this summer of precise attacks that leave few obvious clues of who launched them. (Hasan Shirvani/Mizan News Agency via AP) **FILE**
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